... Torsion springs, Battery spring, Power spring, Coil spring , Leaf spring, Mould spring,etc., and other unique feature products. 1Place of Origin ... from Germany,vacuum melting furnace,CNC machine center17Production euipment:devise industrial,auto, motorcycle, electronics, machinery, sports goods, equipment, toys,etc18For ... Number of coils(6) Qty Galvanized Steel compression spring for industrial use