Perforated Sheet, Aluminum, 3003, 20 Gauge, Finish Mill, Hole Shape Round, Hole Pattern Staggered, Hole Dia. 0.188 in, Temper H14, Length 40 in, Width 36 in, Thickness 0.032 in, Center Spacing 1/4 in, Open Area 51 Percent, Length Tolerance +/-0.125 in, Width Tolerance +/-0.125 in, Thickness Tolerance +/-0.0025 in, Typical Hardness 40, Hardness Scale Brinell, Tensile Strength 22, Yield Strength 22