DEXTER 3.7K 5/4.5 Z H-K IDLER HUB COMPATABLE WITH 3,500LB -3,700LB AXLES, 500HR ZINC COATING, 5 ON 4.5" BOLT PATTERN, 1/2" STUDS, COMES WITH BEARINGS, GREASE SEAL, EZ-LUBE STYLE GREASE CAP, WHEEL NUTS