... metals Products Scope:Compression Spring, Extension spring, Torsion Spring, Battery Spring, Power spring, Coil spring, leaf spring, suspension spring, etc.Main material:Carbon spring steel, alloy spring steel, Refractory steel ... -plated, silver-plated, copper-plated, tin-plated and nickel-plated; Painted, spraying powder, coloringApplications:All kinds of cars, machinery, home appliance ...