This trailer wheel bearing kit fits 5 lug 3,500 lb trailer hubs, fitting the majority of trailer axles with tapered 1 3/8" x 1 1/16" spindles. This kit includes the bearings, seal, and cotter key that you need to get your trailer hub back rolling, just apply grease and install! This kit does not include races to press into your hub, if you need a kit with the races, you will need to purchase our 3,500 lb Trailer Hub Wheel Bearing Kit. The bearings in this kit are the outer 44649 bearing with an inner diameter of 1 1/16 inches, the inner 68149 bearing with an inner diameter of 1 3/8 inches, the double lipped UHI grease seal with an inner diameter of 1.72 inches, and a 1/8" x 2" zinc plated cotter key. This kit is perfect if you have a trailer hub with pre-installed bearings that just require a set of bearings and seals!Features- Fits most 3,500 lb 5 Lug Trailer Hubs- 68149 Inner Bearing: 1 3/8" ID- 44649 Outer Bearing: 1 1/16" ID- UHI Grease Seal: 1.72" ID- Zinc Plated Cotter Key