Aluminum alloy 6061-t4 per astm-b209, golden yellow electrically conductive chemical film per mil-c-5541 class 3 finish, length or height 2.250 in., width 1.130 in., thickness 0.630 in., 2 holes 0.156 in. Diameter spaced 1.000 in. C to c, 2 holes 0.406 in. Diameter spaced 1.220 in. C to c