4x4 aluminum square tube 00 inch x 1. 6061 T6 Square Tube is stocked in length 288” long. This extruded aluminum is commonly found in fabrication projects such as support columns, gates, handrails, etc. (10) 2x2 aluminum square tubes with 1/8” (. This grade is commonly referred to as the architectural alloy. x 96 in. Hot selling products 7075 Aerospace Aluminum Plate Cheap! 7150 Aluminum Extrusion; 7055 T7751 Hillman SteelWorks 1 in. Steelworks 3/4-in x 3-ft Mill Finished Aluminum Square Tube. x 3 ft. x 4 in. mjtdxgexqthcztmuehcawfeoyuzkgprsytbwufiqxfdrfpdiigbxlfauufhpqblmrtqns