Description: K4-100 Trailer Hub Wheel Bearing Kit Fits 8,000 lb. Axles with Grease (No Oil Bath) Kit includes: 01 X 25580/25520 Inner Bearing Set (1-3/4" ID X 3.265" OD) 01 X 02475/02420 Outer Bearing Set (1-1/4" ID X 2.688" OD)