... -5mm 2.material: various of steels 3.OEM offered 4.high quality and reasonable price conical battery ... high quality specification1.made of carbon steel,stainless steel, manganese steel wire, nickel wire, galvanized wire,alloys,etc 2.OEM: all parts ... instruments, optical equipments , power supply, switch, computer peripherals etcCertificatesISO9001,RoHS Equipments Advanced CNC spring machinery, grinding ...