Base plate corrosion resistant steel or aisi 1020 plated steel or steel painted with rustoleum no. 960, 8 in. L, 4 in. W, 0.188 in. Thk; rubber bonded to base plate, 65-70 durometer hardness, 4.875 in. L, 4 in. W, 1 in. Thk; 4 mtg holes in base plate 0.557/0.592 in. Dia, 6 in. Apart parallel to length, 2.5 in. Apart parallel to width
