1. Regarding of stainless strip in coil, we are very specializing in csp, b/a (cold strip for spring - hard tempered) -1.4310(aisi301), 1.4301(aisi304), 1.4307(aisi304l) and ep11(1% nickel). ** thickness : 0.07mm ~1.50mm ** width : 7mm ~ 400mm 2. Now, we would like to introduce our new substitute item of aisi 301. Our new item is a sk-5 (t/s 2000 ~ 2400n/mm2 - for power spring) for seat belt, clock and vacuum cleaner spring. We already developed and tested the item with posco We are sure that you will be satisfied with our quality. ** thickness for power spring : 0.10mm ~0.40mm ** width : 7mm ~ 290mm ** t/s : min 2, 000n/mm2 ** thickness for gerneral application : 0.50mm ~ 1.70mm ** width : 30mm ~ 400mm ** soft tempered : hv190 max, hard tempered : hv260 max