Steel channel 1.Size:41*41mm and 41*21mm 2.Thickness:1.5mm to 3.0mm 3.Length:3m,5.8m,6m ... Steel channel1.Thickness:1.5mm--3.0mm2.Length:3m,5.8,6.0m3.The ... H:15--100mm A:5--50mm B:5--30mm t:1--3mm Surface treatment:hot dip galvanized, cold galvanized, pre- ... galvanized2.Thickness:1.5mm,2.0mm,2.5mm,2.7mm,3.0mm3.Length ...