... , including Compression springs, Extension springs, Torsion springs, Battery spring, Power spring, Coil spring , Leaf spring, Mould spring,etc., and other unique feature products. 1Place of Origin ... per Day discussable11Wire diameter range:0.15-8mm12Material:carbon steel,stainless steel, manganese steel wire, nickel wire, galvanized wire,alloys,etc13Casting experience:More ...