... contact black compression spring with high quality specification1.made of carbon steel,stainless steel, manganese steel wire, nickel wire, galvanized wire,alloys,etc 2.OEM ... black compression spring with high quality Brand NameXLSWire dia0.1 to 5mmMaterialCarbon steel, stainless steel, manganese steel wire, nickel wire, galvanized wire,alloys,etc Surface ...