... ,5.8m,6m 2.Thickness :1mm to 12mm 3.Material :black steel ,galvanized steel ,stainless steel C Channel C steel ChannelProduct: C channel ,steel ... channelStandard:ASTM ,JIS ,DIN,ENMaterial: Q195,Q235 Q345,SpCCThickness: 2mm ,2.5mm,3mm,4mmWidth ...