1)Free Sample 2)Shape: Custom-made , Standard 3)Lasting and durable 4)OEM ... PartsLoad Type: CompressionMaterial: Steel,Brass,Matel,EtcUsage: Automobile;Auto;CarCertificate: ISO9001, TS/16949Continuous Coil Spring; 1.Material: ... zinc plating ,powdered,pas3.All our products are made by high-quality steels and first-class producing ... passed)Our workshopMain Prouducts metal washers for auto spare parts