Technical specifications: Outer diameter: 25-508mm Single length: 3-14m, fixed length as per client?s requirements Standards: API SPEC 5CT, API SPEC 5B, API SPEC 5L, Slot size (mm): 0.10, 0.15, 0.2, 0.25, 0.30-3, also achieved upon customer's request. Open area up to 60%. Material: low carbon, low carbon galvanized steel (LCG), steel treated with plastic spraying, stainless steel, steel (304) End connection: plain beveled ends for butt welding or threaded. Packing: plain/bevel end with end caps, Waterproof packing, bare packing, in bundle, nest packing, standard export packing Certification: ISO 9001:2000 Delivery lead time: after received deposit 10-60 days according to the quantity Payment terms: T/T, 100% L/C at sight Port of shipment: Tianjin, Shanghai port, Qingdao port Quality control: Company has perfect quality assurance system, advanced testing equipment and high-qualified management team with control over series of activities such as contract signing, product research and development, productive process and test, product preservation and delivery.