... experience in not only order production but also small order, and develop the products with excellent ... springs, Torsion springs, Battery spring, Power spring, Coil spring , Leaf spring, Mould spring,etc., and ... carbon steel,stainless steel, manganese steel wire, nickel wire, galvanized wire,alloys,etc13Casting experience:More than 20 years14Strong ... coils Manufacturer supplied precision oil filter ring