1.Material: stainless steel, swc,swpb 2,Wire Dia:0.1-5mm 3.Surface :Nickel-plating ,black , ... carbon spring steel, alloy spring steel,refractory steel, stainless steel, high temperatureresisting alloy, corrosion-resistant alloy and bronze 6) Widely used ... produce many kinds of spring, such as the compression spring, tension twist spring, linear spring, battery spring,recliner spring chair springand ...