... tube Standard: GB, ASTM, BS, JIS Material: Q195, Q215, Q235 Q345B, X42, Gr. B OD: 15*15mm-400*400mm, WT: 0.6mm ... , Q215, Q235, Q345BOD: 15*15mm-400*400mm, WT: 0.6mm-12mm SQUARE PIPESQUARE PIPE BEST QUALITY LOWEST PRICEProduct nameSquare tubeSpecificationOD ... : 15*15mm-400*400mm, WT: 0.6mm-12mmMaterial of Square PipeQ195, Q215, 20#, 10#,StandardsASTM-A53. ...