It may not be on the forefront of your mind, but a trailer's wheels need to be cared for just like the wheels of your vehicle. This wheel bearing kit includes two bearing cones, two bearing cups, a grease seal and a cotter pin. The bearings are designed to automatically maintain the correct internal pressure and not damage the seals. This kit fits a 1-1/16" diameter. Features a 1-1/16" inside diameter Automatically maintains the correct internal pressure to avoid seal damage Limited lifetime warranty (one-year finish, one-year parts)