"material:aluminum, copper, brass, stainless steel, steel, iron, alloy, zinc etc. Delivery time:within 8-15 workdays, working day for large quantity after deposit or payment received, within 5-7 days working day for sample or below 100 pcs . *150mm 4.As your request. Specification and gauge:produce according to customer's requirements.We are professional in non-standard fastener. Purchasing notice:please lets know the size, quantity, material or grade, surface, if it is special and non-standard fasteners. Slight problem:please send the proof to our after-sales department, we will reply within two days. Serious problem:we will dispatch our quality and problems appraisers to make a confirmation. Usage:our products are typically used in kinds of cars, machinery, home appliance, electronic products, electric appliance, stationery, computers, power switches, miniature switches, architecture, commodity and a/v equipment, hardware and plastic molds, sports equipment and gifts, and more. Machining equipment: heading machine, threading machine, cnc milling&turning machine, general milling&turning machine, grinding machine." Carton packing /wooden case packing / standard packing /special packing depend on your requirement