The Redneck Trailer Supplies Dexter 12K Trailer Hub Kit is the perfect solution for your trailer needs. This trailer hub assembly fits idler axles and comes with all the necessary components for a complete installation. The kit includes bearings, races, oil seal, oil cap, retaining ring and lug nuts, all made of sturdy iron construction. The clear oil cap allows you to easily check the lubrication level of the hub. FleetPride is your First Click in Heavy Duty®.