This Galvanized Trailer hub and Bearing Kit mounts on your trailers 2,000lb capacity trailer axle. This is a 5 Lug, 5 on 4 1/2 Galvanized Trailer hub with the races pre-installed. With this kit, we include the inner and outer bearings and grease seals required. This Kit is for 1 1/16" Straight Trailer Spindles. This means that the Spindle (the component that the bearings rotate around) and that supports the hub and wheel, utilizes the same size bearing on the inside and the outside. These Hubs can be easily confused with 3,500lb Hubs at first glance, but are very different and are not interchangeable. We offer this hub kit on our website as a replace