... quality and competitive price Compression Springs: 1, Material: carbon steel, spring steel, stainless steel, alloy steel.2, Wire Dia.: 0.3mm ... springs8, Applications: Automotive, Medical device, Electronics, Toy, etc. materialCarbon steel,spring steel,stainless steel,alloy steel, etcWire dia.0.3mm-10mmSurface ... information or send us inquiry with details directly. Ball pen Compression Springs