Aluminum alloy qq-a-250/4 2024-t4; 2.720 in. Lg; 0.750 in. W; 2.560 in. H; three 0.136 in. Diameter holes in small angle on same centerline spaced 1.000 in. C to c; three 0.151 in. Diameter holes in lrge angle irregularly spaced; aperture and mtg holes per m020-20cf