Pre Galvanized Square Tube OD:15*15mm-170*170mm Length: 2-12m Thickness:0.6mm-2.5mm Material:Q195/Q235 Quick Details Standard: BS, JIS, GB, ASTMStandard: BS 1387, BS EN10296, BS EN10219, BS E...Grade: A53-A369, ST35-ST52, Q195-Q345Grade: A53(A,B), St37, St52, St42, Q235, Q345, ...Thickness: 0.5 - 2.5 mmSection Shape: SquareOuter Diameter: 15*15-170*170mmPlace of Origin: Tianjin China (Mainland) ...