Material alum alloy 5052-h32 per qq-a-250/8 (sm 1870-21).028/.022 thk; finish chromate chem film per mil-c-5541 clia; dimensions 7.140 min, 7.160 max; mounting holes (3)- first 0.975 in from left side, second 6.925 in from left side, third 6.925 in from left side