aluminum square tube 1.out dia 20-250mm 2.wall thk 3-20mm 3 ... .alloy 6063,6061,6A02,3003,etc. 4. top quality,reasonable price aluminum square ... tube1.Specifications PRODUCTaluminum tubeALLOY1060,2A12,3003,3A21,5A02,5052,6063,6061,6A02 OUT DIAMETER 20-250mmWALL ... 87866700.I will reply you soon China manufacturer aluminum square tube for building