... large spangle , oiledGalvanized round pipe / black tube , square pipe / Galvanized square hollow section We have advantage in quality, price, regular ... : 0.5mm~2.2mmLength:1000mm-12000mm square pipe / Galvanized square hollow sectionStandard (GB/T6728-2002) or ASTM A500 ... channel steel, angle steel, I-beam steel, H-beam steel, flat steel, steel plate, galvanized Steel Pipe, seamless pipe, welded ...