Scaffoldings for construction 1.Standard:ASTM A53,BS1387,GB/T3091 2.Material:Q195,Q215,Q235,Q345 3.OD:48.3mm 4.WT:1.5 ... -3.5mm Scaffoldings for construction1.Standard: ASTM A53,BS1387,GB/T30912.Material ... : Q195,Q215,Q235,Q3453.Size OD: 48.3mm WT: 1.5 ...