Almond : Medicinal value - South almonds, almonds in China called almonds. South almonds are also called sweet almonds, slightly sweet, which is also a way to distinguish between almond and northern almonds. First divided north and south almonds have so few say. North almond Naturally is the northern production of almonds, and also called bitter almonds. Main features - 1, bitter, must be soaked in water for 3 days to remove bitterness. 2, bitter almonds in the bitter taste of the process of almonds will be a lot of loss, so no almond fragrance. 3, bitter almonds have micro-toxicity (brewing when the need for high temperature hot water brewing, to poison). 4, therapeutic effect and sweet almond the same. 5, almond oil content of about 49%, ground into powder after the powder is relatively wet. 6, due to bitter taste, not many people eat, so bitter almond raw material prices are relatively low.
Kiwi : The world's largest consumption of the first 26 kinds of fruit, kiwi is the most comprehensive. The content of Vc, Mg and trace elements in kiwifruit fruit was the highest. Among the top three low-sodium and high-potassium fruits, kiwi is at the top of the list because it contains more potassium than bananas and citrus. At the same time, the content of Ve and Vk in kiwifruit was determined to be excellent, low in fat and no cholesterol. According to the analysis, kiwi fruit vitamin content per 100 grams of fresh samples in general 100-200 mg, high up to 400 mg, about 5-10 times the citrus; sugar 8-14%, acid 1.4-2- 0%, but also with tyrosine and other amino acids 12 species. kiwi fruit contains a wide range of nutrients, most of the fruit is rich in one or two nutrients, but each kiwi can provide 8% DV folic acid, 8% DV copper, 8% pantothenic acid, 6% Fresh, 4% DV iron and vitamin B6, 2% DV phosphorus and Va as well as other vitamins and minerals. Kiwi in addition to kiwi alkali, proteolytic enzymes, tannin pectin and sugar and other organic matter, as well as calcium, potassium, selenium, zinc, germanium and other trace elements and the human body needs 17 kinds of amino acids, but also rich in vitamins, , Fructose, citric acid, malic acid, fat. A kiwi can provide a day more than twice the demand for vitamin C, known as the "king of fruit." Kiwi also contains good soluble dietary fiber, as the fruit of the most eye-catching place is contained in its superior antioxidant properties of plant chemical substances sod, according to the US Department of Agriculture research report, kiwi comprehensive antioxidant index in the Fruits among the top, second only to the thorns, blueberries and other small fruit, far stronger than apples, pears, watermelon, citrus and other daily fruits. And blueberries belong to the second generation of fruit is quite representative. Compared with sweet orange and lemon, kiwi fruit contains vitamin C ingredients are two times the first two fruits, so often used to fight against scurvy. Not only that, kiwi can stabilize mood, lower cholesterol, help digestion, prevent constipation, as well as thirst and diuretic and protect the role of the heart.
Petroleum Coke Product Description : Petroleum coke is a byproduct of the oil refinery industry. Petroleum coke refers to all types of carbonaceous solids obtained in petroleum processing, which includes green or raw, calcined and needle petroleum coke. Petroleum coke is used in many applications, including electrodes and anodes. It is also used as a fuel in the metal and brick industries. Price of product ( USD price or FOB price) : 10.000 MT monthly market price. 100.000 MT monthly market price Less 8%. Product origin : Russia and Non Russia Key Specifications/Special Features : Fuel Grade Petroleum coke of Low/High Sulphur. Calcium Petroleum coke, Graphitized Petroleum coke. Raw Petcoke, Anode Grade, Green Grade, Carbon Grade, Cement Grade, Needle coke, etc. Minimum Order Size and Packgaing details : Bulk in tanker vessels. Tanks 20 MT.
Diesel En590 10-50-500-5000 And Others Ppm Ultra Low Sulphur. D2 0,2-62 Gost 305-82 Or 0,01 Or 0,05. D2 Automotive Fuel Oil (ago). D6 Virgin Fuel Oil. Hsd Diesel High Speed 500ppm En90. Diesel En590 Euro4 Gost 52368. Pms Premium Motor Spirit Jp54 (ts1) Gost 10227-86. Jet Fuel A1 Gost 10227-86. Marine Fuel Oil Cst 180-280-380. Espo (siberia Pacific Oil) Crude Oil Api 34,7. Lco (light Cycle Oil). Mazut Mt100 Gost 10585-75 And 10585-99. Rebco Gost 51 858-2002/9965-76 Api32/crude Oil 39-1623-93. Lpg 50/50 Propane/butane - 70/30 P/b. Lng 5542-87 By Iso Containers Etc. Gasoline All Types (87-89-92-95). Bitumen/asphalt All Grades. Fertilizers Urea, Dap, Etc Product Description : Petroleum products are materials derived from crude oil (petroleum) as it is processed in oil refineries. ... These fuels include or can be blended to give gasoline, jet fuel, diesel fuel, heating oil, and heavier fuel oils.. Price of product ( USD price or FOB price) : 20.000 MT monthly market price. 100.000 MT monthly market price Less 5%. Product origin : Russia and Non Russia Key Specifications/Special Features : All types/grades of Fuels, Gas, Oil are available for supply. Many commercial names for oils, fuels, gases, etc. are used in the market. To avoid misunderstanding basic details of specifications needed by buyer are mandatory. Specifications for types/grades of products (special grade needed by buyer) will be issued after received your credible purchase request in the form LOI/ICPO docs. Minimum Order Size and Packgaing details : Bulk in tanker vessels. Tanks 20 MT.
Our Acid Battery Scrap on 99.99%. Monthly Supply Capacity: 500 - 1500 metric tons, Type: all kind of scrap batteries, Fe Content: HMS Fe Content (%): 100%) Drained Battery Scrap: Black Packaging Detail: Pallet with shrink wrapping Battery features: - Sealed and maintenance free operation battery - Non-Spillable construction design. - ABS Containers and Covers (UL94HB), UL94V-0 optional. - Safety valve installation for explosion proof. - High quality and high reliability. - Exceptional deep discharge recovery performance. - Low self discharge characteristic. - Flexibility design for multiple install positions. - No memory effec - CE certificate - Wide operating temperature range Battery Application: -Solar system - Alarm System - Cable Television - Communication Equipment - Control Equipment - Security System - Medical Equipment - UPS - Power Tools - Toys - Emergency Power System - LED Lig WE ARE TRADING MANUFACTURERS OF ALL TYPES OF used car scrap battery WORLDWIDE. Specifications we are offer 1.dry charged battery & MF battery 2.Meet all DIN & JIS standard 3.Powerful quick scrap used a car battery Specifications Specifications 1.dry charged battery & MF battery 2.Meet all DIN & JIS standard 3.Powerful quick start & long life 4.1-2 year used car scrap battery 2/Product Feature: (1)Maintenance-free operation.there is no need to check specific the gravity of the electrolyte or add water to a battery during float service life. (2)Low self-discharge rate, small internal resistance. (3)The unique construction and sealing techniques of the battery, add the ABS plastic crust that guarantees leakproof operation in and position with no adverse effect on capacity or service life. (4)With our high-quality lead-tin-calcium alloy grids, it has a long usage life and deep discharge recoverability. (5)No pollution and no harm. Drained Lead Car Battery Scraps (Rains) Drained Lead-Acid Battery Scrap (RAINS per ISRI
Drained battery scrap (free of battery acid/fluid) including lead plates and plastic/rubber casing complete with caps. Purity : Complete Battery with full contents, except the liquid Car batteries are treated as hazardous waste. Material Origin : Car Battery / Van Battery / marine batteries and industrial traction batteries. Drained Lead Car Battery Scraps (Rains) Drained Lead-Acid Battery Scrap (RAINS per ISRI Specifications). Our Acid Battery Scrap on 99.99%. . Automotive Waste Batteries completely washed, cleaned with lead acid contents. RAINs per ISRI Specifications) (Product Detailed SpecWET/DRY WHOLE INTACT CAR LEAD BATTERIES(RINKs and ifications) height :116mm and whight :310 gr height :123mm and whight :350 gr Used Auto Battery Scrap Drained lead battery scraps Lead Battery Plate Scrap Type Battery Scrap 20D 16H Lead Battery Plates Scrap Lead Battery Plate Scrap Type soft lead scrap Drained / Dry Whole Intact Lead Batteries (RAINS) Lead Battery Scrap >> Drained / Dry Whole Intact Lead Batteries (RAINS) SCRAP DRAINED/DRY WHOLE INTACT LEAD BATTERIES : To be free of any liquid. Cases to be either plastic or rubber and be complete including caps. Non-lead (ni-cad, ni-fe, carbonaire, etc.) not acceptable. Seller Listings Drained / Dry Whole Intact Lead Batteries (RAINS) 6V1.3AH sealed lead acid battery. 1/Product Specification: Item No.:DHB613; Voltage:6V; Normal capacity:1.3AH/20hr; Dimension(L*W*H):97*24*52mm; Total height(with terminal):57mm; Weight:0.30kg; 2/Product Feature: (1)Maintenance-free operation.there is no need to check specific gravity of the electrolyte or add water to battery during float service life. (2)Low self-discharge rate, small internal resistance. (3)The unique construction and sealing techniques of the battery, add the ABS plastic crust that guarantee leakproof operation in and position with no adverse effect to capacity or service life. (4)With our high quality lead-tin-calcium alloy grids, it has a long usage life and deep discharge recoverability. (5)No pollution and no harm.
Silicone Foam Wound Dressing the silicone dressing is a highly absorbent dressing made from hydrophilic polyurethane foam, ideally designed for heavily exuding wounds. The soft flexible foam absorbs large amount drainage, ensures patients comfort; the top backing film protect wounds against external bacterial. It's a disposable sterile product,it consists of silicone gel and polyurethane foam ,it has high liquid absorptive volume, isolates the wound penetrent liquid from the wound effectively,and reduce the possibility that the wound is infected.The product can form and keep a moist environment,promote wound healing ,and reduce the second damage when changing the dressing. Information for Use: 1)clean the wound with saline. 2)dry skin around the wound, select the appropriate specification ( crop the product if necessary ). Cover the wound completely. 3)tear the face mask, Stick to the wound. 4)use the second dressing to fix (island). Applications: Pressure ulcer Leg venous ulcer Diabetic foot ulcer First and second degree burns Skin grafts and donor site Post-operative and traumatic wounds Advantages: high absorptive volume of liquid isolate the wound penetrent liquid from wound, reduce the infection heal without scab,reduce the scar promote wound healing
Silicone Foam Wound Dressing the silicone dressing is a highly absorbent dressing made from hydrophilic polyurethane foam, ideally designed for heavily exuding wounds. The soft flexible foam absorbs large amount drainage, ensures patients comfort; the top backing film protect wounds against external bacterial. It's a disposable sterile product,it consists of silicone gel and polyurethane foam ,it has high liquid absorptive volume, isolates the wound penetrent liquid from the wound effectively,and reduce the possibility that the wound is infected.The product can form and keep a moist environment,promote wound healing ,and reduce the second damage when changing the dressing. Information for Use: 1)clean the wound with saline. 2)dry skin around the wound, select the appropriate specification ( crop the product if necessary ). Cover the wound completely. 3)tear the face mask, Stick to the wound. 4)use the second dressing to fix (island). Applications: Pressure ulcer Leg venous ulcer Diabetic foot ulcer First and second degree burns Skin grafts and donor site Post-operative and traumatic wounds Advantages: high absorptive volume of liquid isolate the wound penetrent liquid from wound, reduce the infection heal without scab,reduce the scar promote wound healing
Fly Ash: Fly Ash is by product generated during combustion of coal, and comprises the fine particles that rise with the flue gases. Ash which is collected from the bottom is termed bottom ash. Fly ash is collected by electrostatic precipitators or other particle filtration equipment before the flue gases reach the chimneys of coal-fired power plants and together with bottom ash removed from the bottom of the furnace is in this case jointly known as coal ash. Depending upon the type of coal being used, the specification of Fly Ash varies considerably, but Fly Ash contains substantial amounts of silicon dioxide and calcium oxide (CaO), both being endemic ingredients in many coal-bearing rock strata. We are a reputed Fly Ash Exporter based in India and are supplying Fly Ash different cement, ready mix concrete, steel, refractories and construction industries. The Major Utilization Areas Of Fly Ash : - Manufacture of Portland Pozzolanic Cement & Performance improver in Ordinary Portland cement (OPC). - Part replacement of OPC in cement concrete. - High volume Fly Ash concrete. - Roller Compacted Concrete used for dam & pavement construction. - Manufacture of ash bricks and other building products. - Construction of road embankments, structural fills, low lying area development. - As a soil amender in agriculture and wasteland development. Types of Fly Ash: - According to the type of coal used fly is classified into two types. Anthracite and bituminous coal produces Fly Ash classified as class F. Class C Fly Ash is produced by burning lignite or sub-bituminous coal. Class C Fly Ash has self-cementing properties. - Class F and Class C Fly Ash are products of the combustion of coal in large power plants. Fly Ash is collected in electrostatic precipitators or baghouses, and then transferred to large silos for shipment. When needed, Fly Ash is classified by precise particle size requirements, thus assuring a uniform, quality product. - Class F Fly Ash is available in the largest quantities. Class F is generally low in lime, usually under 15 percent, and contains a greater combination of silica, alumina and iron (greater than 70 percent) than Class C Fly Ash. - Class C Fly Ash normally comes from coals which may produce an ash with higher lime content generally more than 15 percent often as high as 30 percent. Elevated CaO may give Class C unique self-hardening characteristics. Minimum Order Quantity : 1 container
Raw Bauxite: Bauxite is a soft, whitish to reddish-brown rock consisting mainly of alumina-bearing hydroxides, oxides of iron, silicon and titanium with impurities of Ca, Mg, Cr, V, P, Ga and other elements. Raw Bauxite is a major source of aluminium. Basic alumina containing minerals of Bauxites are gibbsite Al(OH)3, Boehmite g-AlO(OH) and Diaspore a-AlO(OH). We are a major Raw Bauxite Exporter based in Maharashtra (India) and catering to the diverse demands of several middle and eastern Asian countries. About Raw Bauxite: The processing of Raw Bauxite is done at a number of alumina refineries in the world. Bauxite can be processed at a low-temperature autoclave digestion (145 oC to 155 oC). Raw Bauxite can be used also for sweetening stage and for non-autoclave digestion in agitators (105 oC). About 85% of bauxite mined worldwide is used to produce alumina for refining into Aluminium metal and the balance 15% is processed and value added to make its way to other uses like refractory, chemical, cement, abrasives, etc. Aluminium is possibly the most versatile product with applications in almost every industry. Since Bauxite is the primary source for Aluminium there will always be an ongoing promising demand for the same. Application & Uses of Bauxite: Raw Bauxite is successfully used for metallurgical grade alumina production besides applications in the cement industry, alumina chemical, steel, alum, energy industries, flame-retardants, etc. Bauxite is used in : - Aluminium - Cement - Chemical - Blast Furnaces - Iron/Steel Ladles, etc. Advantages of Artha Bauxite: Artha Mineral Resources has good sources for Gibbsitic Bauxite which requires low digestion temperature (145 oC -155 oC) making it more economical to process. Mines are also in close proximity to all-weather ports which makes it very convenient and cost effective to ship this material.
Commodity: Ammonium nitrate porous prills Molecular formula: NH4NO3 Molecule Weight: 80 CAS: 6484-52-2 UN:1942 Hazardous class:5.1 Commodity: Ammonium nitrate porous prills 1.Production of granular porous ammonium nitrate for industrial use and agricultural granular ammonium nitrate. Products with low moisture content, not easy to cake; high compressive strength, not easy to break; high oil absorption rate. Ammonium nitrate content is more than 99%, the appearance is white granular crystals, no impurities visible to the naked eye. 2. Purpose: Explosive material: granular ammonium oil explosive is made by mixing porous ammonium nitrate with raw oil. Its speed can reach more than 3 200 m/s. This explosive has strong explosive power, safe and reliable use, low price, cost saving, and can usually reduce the cost by 20%-40%. At present, this kind of explosive has been widely used in mining, construction, railway and highway construction, agricultural and water conservancy construction and national defense and other fields. 3. Product specifications: Specifications: Appearance white granule Particle size 0.5-2.5mm NH4NO3 >99.5% N >34% Oil absorption > 8% Moisture < 0.2% PH >4
We can supply Acetic Acid Industrial Grade and Food Grade. Commodity:Acetic acid. Other name: Glacial acetic acid Molecular formula CH3COOH CAS:64-19-7 EC No.200-580-7 Introduction: Annual capacity of our glacial acetic acid is 350,000.the raw material is methanol.we use a new technical process to produce: Methanol decomposition. the most important characteristic of this way are as following: mild oder; high quality--can reach 99.99%min; low cost--30% lower than oil decomposition and ethanol decomposition way. Specifications: Apha color:
Product Features The purity of the product, calcium and phosphorus ratio appropriate to ensure a higher degree of its biological effects. Phosphorus content greater than 21% of the products, their biological effects better. This unique high-tech companies use technology to make our products crystallization, high purity. Drying process advanced products, products with low free water under the premise that the product does not lose crystallization of water, avoid the product in the drying process for the loss of water caused by crystallization of biological effects of the reduction. coarse particles MDCP in the animals stay in the stomach longer and more conducive to the absorption of calcium phosphate, the product produced by micro-particles MDCP form, without any chemical binder. Specifications Appearance white powder or granule Phosphate  21% min Calcium     15% min Fluorine    0.18% max Arsenic    30ppm max Pb   30ppm max Source of OriginRock Packing and Storage Knitted bags lined polyethylene plastic bags double packaging, Weighing 25Kg. Transportation-and harsh rain. Stored in a cool, ventilated, dry place.
Monocalcium Phosphate (MCP) Feed grade Product Features The purity of the product, calcium and phosphorus ratio appropriate to ensure a higher degree of its biological effects. Phosphorus content greater than 22% of the products, their biological effects better. This unique high-tech companies use technology to make our products crystallization, high purity and its harmful impurities significantly below standards:HG28611997 Drying process advanced products, products with low free water under the premise that the product does not lose crystallization of water, avoid the product in the drying process for the loss of water caused by crystallization of biological effects of the reduction. Specifications Appearance white powder or granule Total P 22%min Ca 13-18% F 0.18% max As 10 ppm max Pb 10ppm max Moisture 4%max Source of OriginRock Packing and Storage Knitted bags lined polyethylene plastic bags double packaging, Weighing 25Kg. Transportation-and harsh rain. Stored in a cool, ventilated, dry place
Commodity: Dicalcium phosphate Feed Grade Use DCP is the feed preparation of raw materials, Animal right to supplement calcium needs. Coarse its products more applicable to the preparation hens, ducks feed, concentrate feed and premix. Product Nature Molecular Formula:CaHPO4·2H2O,Molecular weight:172.09,After drying with loose white powdery crystals or granules. Neutral products, the melting acid, water-soluble, hygroscopicity small, heated to 90 around gradually lose water of crystallization. Product Features The purity of the product, calcium and phosphorus ratio appropriate to ensure a higher degree of its biological effects. Phosphorus content greater than 18% of the products, due to a small amount of MCP, and its biological effects better. This unique high-tech companies use technology to make our products crystallization, high purity and its harmful impurities significantly below standards:HG26362000 Drying process advanced products, products with low free water under the premise that the product does not lose crystallization of water, avoid the product in the drying process for the loss of water caused by crystallization of biological effects of the reduction. Coarse particle DCP in the animals stay in the stomach longer and more conducive to the absorption of calcium phosphate, the product of Micro-particle DCP granulation from mechanical, without any chemical binder. Specifications Appearance white and gray powder/granule Total P 18% min Calcium 21% min F 0.18% max As 30 ppm max Pb 30 ppm max Packing and Storage Knitted bags lined polyethylene plastic bags double packaging, Weighing 25Kg/50KG/1000Kg. Transportation-and harsh rain. Stored in a cool, ventilated, dry place.
1,Name: Sodium nitrite Molecular formula: NaNO2 Formula weght:69.00 2Property: (1) ordinary sodium nitrite: white little crystals or light yellow  (2) dry powder sodium nitrate: white crystal,non-caking, showing loose status. Density:2.168. No odor, slightly salty. It is liable to deliquesce, dissolved in water,soluble in liquid ammonia,slightly soluble in ethanol and glycerin,Melting Point:271. Decomposition temperature is 320. It has oxidability and also has reducibility. It will slowly be oxidized into sodium nitrate in atmosphere, it can form nitrogen compound with nitrilo at low temperatures. 3Usage:It has been widely used in making nitro-compound and azo dye, mordant of textile dyeing, bleaching agent, metal heat finishing agent, cement early strength agent, and deicing agent etc. Note: The product should be stored in a cool, dry place to prevent it from moisture, heat and sunlight. This product can not be mixed with strong reductant, inflammable and explosive materials, food, feed and additives. â?¢ This product is toxic and should be properly kept and can not be eaten. 4 Specification: (Technical Standards:GB2367-2006) Item Unit Molten salt G High G First G Qualified G Dry powder G Assay % 99.3 99.0 98.5 98.0 98.5 Sodium nitrate % 0.6 0.80 1.00 1.90 0.80 Chlorides % 0.03 0.10 0.17 -- 0.1 Water insolubles % 0.02 0.05 0.06 0.10 0.06 Moisture % 1.0 1.4 2.0 2.5 0.2 Loose degree -- -- -- -- 95 5,Package: net 50kg net each in plasic woven inner plasic bag, or according to customers requirement.
Natural Gypsum: Gypsum (CaSO4.2H2O) is a naturally occurring mineral mined from deposits formed by ancient sea beds as a raw material, white when pure, but commonly grey, yellow, red or brown, owing to impurities. The anhydrous form (CaSO4), anhydrite, is common. We are enlisted amongst the topmost INatural Gypsum Importers and Exporters from India. Applications: Gypsum has many industrial applications in its raw or Calcined forms, especially in the building and construction industries. Uses of Raw Gypsum are principally as: - a retarder for Portland cement - a fertilizer or soil conditioner - mineral filler - oxidizing agent in glass manufacture or other industrial applications. Most gypsum is calcined and used in the manufacturing of plaster products. Wallboard and plaster requires gypsum contents greater than 85%, although producers prefer a minimum of 94–95% along with whiteness in color. The major consumers of the Gypsum at present are Cement Industry. By weight about 4% to 6% Gypsum in crushed condition is utilized in Portland Cement Manufacture after mixing with cement/clinker. Gypsum acts as a retarder and controls the setting time of cement. Imported Gypsum from Iran: Natural Gypsum is one of the most superior qualities and consistent material available for Import and Export. Natural Gypsum has adequate whiteness, high purity as well as it is low in cost which makes it absolutely feasible for white cements as well as Plaster Of Paris manufacturing and for the Cement Industry all together. One more important quality that distinguishes Natural Gypsum from others is its hardness which is less as compared to other sources and allows different industries to easily grind the same for processing into final product which in turn results in to reduced power consumption for manufacturing industries.
Kaolin: Kaolin uses are multiple and diverse. Kaolin are used as functional filler, extender, ceramic raw material and pigment because of its whiteness and fine particle size. Kaolin also hold importance as raw material in refractory applications, concrete, rubber and fiber glass manufacturing. We, as a Kaolin Exporter welcome any size of international orders from Middle East and other countries. Applications: Paper: Kaolin used as a coating pigment and as a filler to replace fiber. It possesses desirable optical properties. Concrete: Kaolin helps to improve strength and durability of concrete. When added to concrete mix, reacts with free lime released during cement hydration to produce additional cementitious material, resulting in an improved high performance concrete. Plastics : Kaolin is widely used as filler in the plastics industry because of its inert chemical nature and its unique size, shape and structure. Agriculture : It is used as a carrier and diluent in fertilizers, pesticides and related products. It is suitable as carrier because it aides the retention of the formulations on the plant. Rubber : It is commonly used as functional filler in rubber applications. While Kaolin improves overall performance for Rubber in general, different types of white pigment play specific roles in rubber application. Paint : Kaolin used as an extender in paints. It reduces the amount of expensive pigment such as Titanium Dioxide. It assists with desirable rheological properties that help maintain proper dispersion and provide bulk to the product. Ceramic : Kaolin improves whiteness and brightness of ceramic body. Good plasticity, good shrinkage, low water absorption and casting rate are also very important properties of kaolin.
Ultra Milk come with more healthy variant, low fat and high calcium. This variant make you body feel more fresh while drink it. Fresh and delicious taste from fresh milk will perfectly drink it as main drink, or add in coffee or tea. AVAILABLE SIZE (Quantity/Carton) *250ML (24 Pcs) *1L (12 Pcs) Variant: Plain, Chocolate Origin: Indonesia Text: Indonesia ======================== *Big Range More Than 1000 items, So You Can Mix The Product *FCL, Mix Container Load (Dry/Reefer) are welcome *Stickering and Shrink Wrapping are available *Payment terms FOB, CNF -Any Inquiry or need more details about product? feel free to contact us-