... 3) L:2~11.8m 4) Material: hot dip square steel pipe 1.size:10*10mm-600*600mm2.thickness:0 ... . High Quality: ISO900:2000, API5L, API5CL Product square steel pipesStandardGB/T3091-2001,BS1387,ASTM A53, ASTM A106, ... bundles, in loose or seaworthy packing , wrapped with steel strip or at sellers optionUsageConstruction, bridge, highway, machinery ... machine to make sure high quality. hot dip square steel pipe