30.500 in. O/a lg, 4.500 in. Diameter of shaft, 15.000 in o/a diameter of sheave, 18.120 in. Od of sheave case, shaft and sheave set at 120.0 degrees eccentric, supplied w/2 each mtg blocks 10.000 in. O/a lg, 2.500 in. W, with 2 each 1.560 in. Lg 1.060 in. Mtg slots each block