This Trailer Bearing Repair Kit includes everything you need to replace the wheel bearings on two trailer hubs. This kit is for 6-bolt hubs on axles with a 1-3/4" to 1-1/4" tapered spindles and includes 4 bearings, 4 bearing races, 2 grease seals (SL-213) 2.125 I.D, 2 cotter pins and 2 dust caps.