Material Composition: Aluminum alloy containing roughly 6.2% Zinc, 2.3% Copper, 2.2% Magnesium, and 0.12% Zirconium (Alloy 7050). 1-1/4″ thick Aluminum 7050 PLATE 2-5/8″ x 10″ Long 1.24 X 2.68 X 11 the width and length are close to the decimal size given but not exact.