Aluminum Round Tube, Aluminum, 6061, T6, Round, 24 in Overall Length, Outside Diameter 4 1/2 in, Inside Diameter 3.5 in, 0.5 in Wall Thickness, 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, Standards AMS QQ-A-200/8, System of Measurement Inch