Libra Set of 2 Trailer Idler Hub Kits 5 on 5" for 3500 lbs Axle - 22018K Set of 2 New trailer idler hub kits 5 on 5" for 3,500 lbs trailer axle Bolt pattern: 5 on 5", bearing races and 1/2"-20 studs installed Kits also includ: 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