... 65Mn,Q195, Q215, Q235, Q345 2) Color: black, bright, blue and yellow. 3) Size: 0.3-2.3mmx40-230mm Surface colors ... : Black gray, bright(white), blue finished and yellow finished.Carbon steel 65mn 50# Q195 Q215 Q235. Thickness ... packing strip,rolling shutter spring steel strip, hardware and tools, band saw blade and other industrial-used steel strip. All the products offered ...