Aluminum Round Tube 6061, Aluminum, 6061, T6, Round Tube, 4 ft Overall Length, Outside Diameter 3/8 in, Inside Diameter 0.259 in, 0.058 in Wall Thickness, Fabrication Cold Drawn, Heat Treatable Yes, Mechanical Finish Mill, Yield Strength 40,000 psi, Tensile Strength 45,000 psi, 95 Brinell Hardness, 60 Rockwell Hardness, Includes Material Certificate Yes, Standards ASTM B210, System of Measurement Inch