Cast iron; 8.000 in. O/a dia; 2.717 in. Min, 2.718 in. Max bore diameter at each end; 2.250 in. Bore diameter through center section; 3.000 in. Diameter of body; 5.000 in. O/a lg; 1/8 in. Pipe thd 0.344 in. Deep drilled into smallest bore @dia; 3.5000 in. Diameter of drum body