Dodge Pillow Block Roller Bearing Unit, Special Duty, Series: 203, 2-3/16 in Bore Dia, 9.13 to 10.38 in Bolt Center-to-Center Length, 3-3/4 in Base to Bore Centerline, 12 in Overall Length, 4.56 in Overall Width, 8 in Overall Height, Two-Bolt Base Mount, Round Bore Type, 4 in Base Width, Adapter Mounted Locking Device, Piston Ring Seal, Non-Expansion Expansion Type, 10716 lb Dynamic, 2300 rpm Maximum, Cast Iron, Black Oxide Quality duplex tapered roller bearingEffective piston ring sealsRugged two-piece housingElongated bolt holes