... 1.0mm-25mm 4.Satndard: BS1387,EN10219,ASTM A53 Steel Square Pipe1.size:10*10mm-400*400mm2.thickness:1.0mm-25mm4 ... 6M,9M4. High Quality: ISO900:2000, API5L, API5CL Product Steel Square PipeStandardGB/T3091-2001,BS1387,ASTM A53, ASTM A106, EN10219MaterialQ195,Q215 ... in bundles, in loose or seaworthy packing , wrapped with steel strip or at sellers optionUsageConstruction, bridge, highway, machinery, and ...