Aluminum alloy qq-a-250/4 cond t3 2024-t3, coat mil-c-15328, prime mil-p-8585 color y mil-p-6808, grey lusterless enamel fed-std-595 color 36231 tt-e-527, treat mil-c-5541, 8.250 in. Min 8.280 in. Max o/a lg, 3.320 in o/a w, 0.060 in. Thk, nine holes 0.156 in. Dia