... color:black,bright,yellow,blue 3.size: 0.25-3.0x30-250mm cold rolled,non-alloy,high ... carbon strip Cold rolled,high carbon ,blue color spring steel strip1) Materail: ... 50# 65Mn2)Color: black, bright, blue ,yellow3 ... to contact me.and please note (material, color, thickness, width, HRC or usage), so ...