Set of 2 New trailer idler hub kits 5 on 4.5 for 3,500 lbs trailer axle Bolt pattern: 5 on 4.5″, bearing races and 1/2″-20 studs installed Kits also includ: 2x L68149 inner cone bearings and 2x L44649 outer cone bearings, 2x Grease seals 1.719″ x 2.565″, 2x E Z lube grease caps with rubber plug; 10 cone wheel nuts 1/2″-20 thread Trailer Parts has been supplying US trailer manufacturers OEM parts 15 years. Bolt pattern: 5 on 4.5″; 1/2″-20 studs installed; bearing races installed; Kit also included: 2x L68149 inner cone bearings and 2x L44649 outer cone bearings; 2 x Grease seals 1.719″ x 2.565″,; 2 x E Z lube grease caps with rubber plugs; 10 cone wheel nuts 1/2″-20 thread ; Works on most 3500 lbs axles in the market; This hub has been wholesaling by large volume to trailer axle manufacturers, we could sell cheap due to our volume!