... usage:IndustriaSpecial-shaped Springs For Farm Machinery Parts Specification1.made of carbon steel,stainless steel, manganese steel wire, nickel wire ... and moderate in price 4.can make sample by hands free of charge 5.advanced CNC spring machinery, grinding and ... DetailInner plastic bag, outer standard carton box, and advised by customer Delivery Detailnormally 30 days after the sample approvalProduct ...