... Steel Spring Wire Dia:0.2mm-15.0mm Grade:316,304,200,201,202 etc Packing: coil,spool,bundle,wooden case etc Stainless Steel Spring ... WireCharacteristics: Uniform and beautiful surface condition, stable linearity, excellent cast and helix, good coil-forming ability for the spring ... rolling various precision spring.MaterialChemical compositionGradeCSiMnPSNiCrCuMoOther2010.1515.5 ... steel wire