... and special requirements. 3.to be superior in quality and moderate in price 4.can make sample by hands ... : Products Name conical battery contact black compression spring with high quality Brand NameXLSWire dia0.1 to 5mmMaterialCarbon steel, stainless ... Treatment Zinc,Nickel,Silver,Golden,Tin-plated,Powder coating Usage Generally used in telecommunication, medical instruments, optical equipments , ...