... high quality Channel steel with reasonable price. Including Chinese standard, Japanese standard and so on.Material: SS400, ST37-2, A36, S235JRG1, Q235, ... Q345 etc. Standard: GB/JIS/EN/ASTM/DIN and others. Packing: ... according to client's requests. Length: 6meter, 9meter, 12meterChinese standard size: 50*37*4.5mm -400*104*14.5mm Japanese ...