Aluminum Round Tube, Aluminum, 6061, T6, Round, 6 in Overall Length, Length Tolerance +/-0.5 in, Outside Diameter 5 in, Outside Diameter Tolerance +/-0.025 in, Inside Diameter 4.5 in, 0.25 in Wall Thickness, Wall Thickness Tolerance +/-0.025 in, Fabrication Extruded, Heat Treatable Heat Treatable, Mechanical Finish Mill, Yield Strength 40,000 psi, Tensile Strength 45,000 psi, 95 BHN Brinell Hardness, 60 HRB Rockwell Hardness, Includes Material Certificate Material Certificate with Lot Number