Square Steel Tube 1.All steels have a large inventory ... 10mm*10mm-1000*1000mm 3.Thickness:0.5mm to 20mm Square Steel Tube1.All steels have a large inventory2.OD: ... /MonthProcessing technology available:oiled,painting,varnish coating,galvanzied,packing in plastic cloths,3 PE, FBE, corrosion resistant coating,Both inner ... Metal Second Market, 6th Steel Road, Xiazhuzhuang, Wuqing District Square Steel Tube