Dodge Flanged Cartridge Ball Bearing Unit, Medium Duty Non-Expansion Single Lip, Series: 206, 1 in Bore Dia, 3.63 in Bolt Center-to-Center Length, 3.63 in Bolt Circle, Four-Bolt Base/Piloted Flange Mounting Type, 4.38 in Overall Length/Diameter, 1.57 in Overall Depth, D-LOK Concentric Clamp Collar Locking Device, Steel Bearing, Nitrile Rubber Seal, 4368 lb Dynamic/2538 lb Static, 5500 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