Dodge Ball Bearing Unit, Normal Duty Non-Expansion, Series: 205 Series, 7/8 in Bore Dia, 3.89 in Bolt Center-to-Center Length, Piloted Two-Bolt Base Flange Mounting Type, 4.88 in Overall Length/Diameter, 1.6 in Overall Depth, 2-3/4 in Overall Height, D-LOK Concentric Clamp Collar Locking Device, Steel Bearing, Nitrile Rubber Seal, 3146 lb Dynamic/1769 lb Static, 7500 rpm Maximum, Powder Coated Precision hardened and honed inner and outer ringsNew rugged housing designWide inner ring designDualGuard positive contact seal including rubberized flingersStronger and flexible ball retainerSimplified anti-rotation devicePremium triple lip QuadGuard seal