Steel w/rubber coating one side; o/a lg 4.355 in.; o/a w 3.565 in.; 0.169 in. Thk; four 0.420 in. Diameter holes spaced 3.450 in. C to c along the lg and spaced 2.706 in. C to c along the w; two 0.534 in. Diameter holes located on one end; one slot centrally located 0.272 in. W, 0.768 in. Lg