Dodge Flange Mount Ball Bearing Unit, Medium Duty Non-Expansion Single Lip, Series: 210, 1-3/4 in Bore Dia, 4.38 in Bolt Center-to-Center Length, Four-Bolt Base Flange Mounting Type, 5.63 in Overall Length/Diameter, 2.1 in Overall Depth, 5.63 in Overall Height, D-LOK Concentric Clamp Collar Locking Device, Steel Bearing, Nitrile Rubber Seal, 7891 lb Dynamic/5213 lb Static, 4500 rpm Maximum, 225 to 400 deg F, Powder Coated Precision-hardened and honed inner and outer ringsNew rugged housing designDual guard positive contact seal including rubberized flingersStronger and flexible ball retainerSimplified anti-rotation deviceWide inner ring design