C/o aluminum alloy 6061-t6, qq-a-325, block 1.125 in. Lg, 0.875 in. H, 0.938 in. W, 1 hole 0.281 in. Diameter through 0.875 in. Way, 0.344 in. From end on center, upper right corner is machined with a 1.250 in. Radius arch longitudinally centering 1.250 in. Above bottom and 1.844 in. From left end, 125 uin finish