1.Name: hot coil big compression spring 2.Style: alloy Steel 3.All ... Products Scope: Compression Spring, Extension spring, Torsion Spring, Battery Spring, Power spring, Coil spring, leaf spring, suspension spring, etc. 2) Main material: Carbon spring steel, alloy spring steel, ... -plated, copper-plated, tin-plated and nickel-plated; Painted, spraying powder, coloring 5) Eco-friendly products:EU ...