... ~600*600mm 3) L:2~11.8m 4) Material: gal square steel pipe tube 1.size:10*10mm-600*600mm2.thickness:0.5mm ... A53, ASTM A363.length:2~11.8m4. High Quality: ISO900:2000, API5L, API5CL Product square steel pipesStandardGB/T3091-2001,BS1387,ASTM A53, ASTM A106 ... Length2~11.8m, or as customers requests.Surface1. Bared , oiled , black painted or as customers’request2. Painting, caps, beveled edges, plain ...