Grey iron casting; 4.250 in. Lg o/a; 3.188 in. W; 2.406 in. Hgt; 1.875 in. Id; four 0.188 in. Lubricating holes spaced 90 degrees apart at one end; one 1/8 in. Pipe tap located 0.438 in. From tap center to other end; two 0.250 in. W by 0.062 in. Deep lubrication grooves on id