... :ShuangXinStyle: Stamping PartsLoad Type: CompressionMaterial: Steel,Brass,Matel,EtcUsage: Automobile;Auto;CarCertificate: ISO9001, TS/16949Continuous Coil Spring; 1.Material:steel,stainless ... , meet the RoHS standards (SGS test passed)Our workshopMain Prouducts flat washer fasteners