1.Name:U channel 2.Size:50*37--400*104 3.Standards:GB, ... /SS540 hot rolled mild steel JIS standard U Channels Mild steel U channel, U steel, Hot rolled U channelMaterial: SS400, ST37-2, A36, S235JR ... *80*13mm1.SGS inspection report2.Channel Steel, U channel, Channel for shipment3.Loading pic4.Contact person GB standard U shape channel steel Q235B