... company produced a variety of 0.2mm-65mm in diameter, spring, metal springsquare spring, disc spring, spring grinding, winding etc.to the instrumentation, automotive, ... About products: our serpentine spring used in sofa, chair, seat and etc.Can make in rolls and cut in pcs.Surface: painted ... size of different springs ,if you cannot locate a spring in the size you can contact us about your require sizes ...