aluminum square tube 1.out dia 20-250mm 2.wall thk 3-20mm 3.alloy 6063,6061,6A02,3003,etc. ... -250mmWALL THICKNESS 3-20mmSHAPE round, square ,oval, flat ect STANDARD GB/T 3880-2006APPLICATION machine,construction,decoration,furniture,industry,etc 2. About ... ISO2000 Quality System Certificate. Our products are widely used in construction,packaging,air conditioner,solar power,cosmetic,etc. It can also ...