compression coil spring 1.wire diameter: 5-50mm 2.Material: 60si2MnA spring steel 3.Style: coil 4.HRC:46-52DEGREE automobile compression coil spring Product Detail 1.wire diameter5-50mm2.Material60si2MnA3.MOQ500pcs each item4.ExecuteISO9001-20005.Delivery timein 30 days6.Supply ability17000pcs/month7.PackingNeutral packing8.Stylecoil9.InspectionFatigue test10.UsageAutomotive/Auto/Car11.Period ...