1.stainless steel compression helical springs 2.Material:stainless steel 3.Wire diameter:0.4mm~ ... 80mm 4.OEM and Customize stainless steel compression helical springs Details as follows: Material55CrSi,60Si2Mn,60Si2MnA,60Si2CrA(SAE9254,SUP12), ... Phosphate, Zinc Coating and Spray, etc.Color Black, White, Blue, Red, Yellow, Gray, etc.Production MethodHot Formed,Cold FormedNoteThe materials and ...