This is a used 10" Dayton-Fayette hub with 4 right hand lugs bolts on 9.44" bolt pattern. This manufacture went out of business in the late 1970's or early 1980's. Finding replacement hubs like this one are next to impossible. This hub comes with the inner and outer bearings, the grease cap, the grease seal and 4 right hand lug bolts. The ID of the hub is 10" with 2-1/4" surface for brake pad. The OD of the hub is 10" and from top to bottom the hub is approx. 7-8" high. The outer bearing is #L44649, the inner bearing is #LM48548. This is a used hub and is not returnable so make sure it is what you need before ordering it.