... :Automotive, medical device, electronics. 3)excellent fatigue strength Muliti-function Adjustable Volute spring Constant compression Springs made by our CNC spring ... , spring steel, brass, aluminum, copper, alloy, etcSurface treatmentpolishing, anodizing, zinc plating, nickel plating, etcTypeCompression springApplicationauto, toy, electronics, medical device, motorcycles, furniture, bicycles, sofa ...