Dodge Pillow Block Roller Bearing Unit, Special Duty, Series: 207, 2-7/16 in Bore Dia, 10 to 11-1/2 in Bolt Center-to-Center Length, 4 in Base to Bore Centerline, 13-1/4 in Overall Length, 5.06 in Overall Width, 8.56 in Overall Height, Two-Bolt Base Mount, Round Bore Type, 4-1/4 in Base Width, Adapter Mounted Locking Device, Piston Ring Seal, Non-Expansion Expansion Type, 11010 lb Dynamic, 2180 rpm Maximum, Cast Iron, Black Oxide Quality duplex tapered roller bearingEffective piston ring sealsRugged two-piece housingElongated bolt holes