Steel drum spring manufacturer 1>Various specification and material 2>OEM and ODM 3> ... spring manufacturerFeatures: 1) Wire Diameter: 0.08~ 10.0mm 2) Type: compression drum spring. 3) Main material: carbon spring steel, alloy ... , telecommunication, craft, toys ,locks,stationery,furiture ,washing machines,vacuum cleaners,lamps and lanterns,bicycles,sports equipment ,etc12) Packing: A. inner packing ...