Stainless Steel Spring Wire (SPR) Application: Springs Steel grade: 302, 304, 316, 130M, 304ES, 201CU, 631, 200CU, 200CU-3, 200CU-1, D667, etc. Wire size: 0.2-8.0mm Surface: Brigth, Dull Temper: as per JIS-WPA, JIS-WPB, JIS-WPC Capability: Produced in accordance with the specifications of JIS, with stable linearity and excellent cast and helix, it can be widely used for rolling various precision springs.