... 3.Professional packing. 4.Size:15*15-600*600mm. 5.Surface:Black painting or oiled steel square tube ... bulk 2.Small OD:packed by steel strips 3.By woven cloth with 7 slats 4 ... company specializing in the production and selling of square, round, rectangular pipe surfaced with galvanized coating ... with Bao steel, Wu yang steel, TPCO, Baotou steel, Shou gang Jin tang Steel, An gang Steel, Daye Steel, HBIS ...