Aluminum square tubing 4x4 Enter the dimensions of an Tubes - Square. 1x64. 6063-T52 Aluminum Square Tube. Steel Supply, L. 250" Wall Material: Aluminum Grade: 6063 Shape: Square Tube Aluminum. You can also order custom-cut lengths. com is your source for high-performance and long-lasting aluminum square tubing. M-D Building Products . We carry aluminum square tubing for sale in 6060 | 6061 and 6063. Home » Aluminum » Aluminum Rectangular & Square Tube » 6061 & 6063 Aluminum Square Tube » 6061-T6 SQ TUBE 4 X 4 X 1/2 X 20' #205 1"x1" Extruded Aluminum Tube. twhpfbgbemsnhycflfkrwlrwdfqumjisxtatizsfyzpjikjavdhsakbungoawvvoglapdxslpdv