Aluminum Rectangular Tube, Aluminum, 6063, T52, Rectangular, 36 in Overall Length, 2 3/4 in Inside Width, 1 3/4 in Inside Height, 3 in Outside Width, 2 in Outside Height, 0.125 in Wall Thickness, Wall Thickness Tolerance +/-0.008 in, Fabrication Extruded, Heat Treatment Tempered, Heat Treatable Heat Treatable, Mechanical Finish Mill, Yield Strength 21,000 psi, Tensile Strength 27,000 psi, 60 BHN Brinell Hardness, 17 HRB Rockwell Hardness