... , GB, JIS (2)Grade: HDG,PG,Powder Coated (3)Shape: C Channel Quick Details Standard: ASTM, GB, JISDimensions: 41*41mm,41*21mmGrade ... .Thickness:1.5mm to 3.0mm 3.Length:3m,5.8m,6mSteel channel 1.Size:41*41mm and 41*21mm 2.Thickness ... ,2.0mm,2.5mm,2.7mm,3.0mm3.Length:3m,5.8m,6m W:25--100mm H:15--100mm A ... :5--50mm B:5--30mm t:1--3mm Surface treatment:hot dip galvanized, cold ...