Aluminum alloy 6061-t6, qq-a-250/11; anodize per mil-a-8625, type 2, cl 2, black; u-shape; 1.820 in. Lg; 2.620 in. H; 1.50 in.W; short leg 1.620 in. Lg; all legs 0.500 in. Thk; 2 thd holes in short leg; 2 0.205 in. Diameter holes 0.560 in. C to c and 0.400 in. From edge in long leg