YOUR BEST CHOICE---- LINYI LIANGYU PACKING STRIP Our factory is specialized in heat treatment quenching steel strip, cold rolled bright annealing material, hot rolled steel strip. There are four colors in the products surface: black gray, bright (white), blue finished and yellow finished.High carbon steel are: 50#, 65Mn, T8-T10A, special type, 60Si2Mn. Low carbon steel is: 40#, 45#,Q195, Q215, ...