Aluminum Rectangular Bar, Aluminum, 6101, T61, Rectangular, 4 ft Overall Length, Length Tolerance +0.125 in/0 in, 4 in Overall Width, 0.25 in Thickness, Fabrication Extruded, Heat Treatable Heat Treatable, Mechanical Finish Mill, Yield Strength 11,000 psi, Tensile Strength 18,000 psi, 71 BHN Brinell Hardness, Includes Material Certificate Material Certificate with Lot Number, Standards ASTM B221, System of Measurement Inch