Hub has 4-bolt pattern on 4" circle. Hub assembly includes (2) L-44649 inner and outer bearings and SL-150-1 (1.50 I.D.) seal for a 1-1/16" diameter spindle. A SL-122 (1.25 I.D.) double lipped grease seal and (2) L-44643 inner and outer bearings are included for a 1" diameter spindle. Kit also contains a SCP-100 cotter pin, DC-1505 dust cap, (4) STN-506 lug nuts and pressed in bearing races. Pilot diameter 2.5 inches, flange diameter 5.56 inches

PLEASE NOTE: This kit will fit trailer axle spindles that have either a 1" or 1-1/16" bearing surface. This kit provides grease seals with axles that have 1.25" OR 1.50" seal surfaces. If you have any questions before ordering - call or email us, we can assist if you have a different spindle/seal size.