... Battery spring, Power spring, Coil spring , Leaf spring, Mould spring,etc., and other unique feature products. 1Place of ... Piece/Pieces per Day discussable11Wire diameter range:0.15-8mm12Material:carbon steel,stainless steel, manganese steel wire ... Germany,vacuum melting furnace,CNC machine center17Production euipment:devise industrial,auto, motorcycle, electronics, machinery, sports goods, equipment ...