Model NO.: 100*68*4.5mm -630*180*17mm Product DescriptionWe supply high quality Channel steel with reasonable price. Including Chinese standard, Japanese standard and so on.Material: SS400, ST37-2, A36, S235JRG1, Q235, Q345 etc. Length: 6meter, 9meter, 12meter Chinese standard size: 100*68*4.5mm -630*180*17mm European standard size: 80*46*3.8mm-600*220*12mmAny information on your market demand ...