... on Standard:BS,ASTM,GB Mill Price Good quality Square Pipe1)Material: Q195/Q215/Q235,Q345,20#,45# ... naked as customers' need;5)Product Type: Square pipe, Rectangular tubes, ERW tubes, Seamless &Welded steel pipe, Galvanized steel pipe, etc.; ... andcommunication, and so on. Product nameGalvanized Square PipeSpecification20mm*20mm-200m*200mmMaterial of Square PipeQ195, Q215, 20#, 10#,StandardsASTM-A53 ...