... spring steel 2 wire Dia:0.2-8.0mm 3 coloured zinc plated 4 ISO9001:2000,ROHS 5 Automotive,machine ... 1. MaterialCarbon steel, Spring steel, Stainless steel, Alloy ... oil4. CertificationISO9001 Certificate, RoHS5. ApplicationsExtensively used for industrial machinery,model springAutomotive, medical device, ... customers' requirements Compression Spring for Machine