ZHUJI HENGGANG SPRING CO., LTD.Professional Springs Manufacturer Product DescriptionThe information of ours Springs 1.Materialcarbon steel(SWC),Alloy steel SEA9260/9254/6150/SUP9/SUP10/SUP12,51CrV4,stainless steel,Music wire/piano wire(SWP);beryllium copper etc.2.Wire diameter or thickness0.1~80 mm3.FinishZinc,Chorme,Nickel, Silver,Gold,..