Reliable Sure-Lube Trailer Hub — 4 on 4in., Model# 125006

Fully assembled Sure-Lube end unit features high-speed marine-grade E-coated hub. Includes hub with spindle, bearings, seal, Sure Lube grease cap completely assembled, and stud nuts packed loose. Sure-Lube greasing system uses no springs, O-rings or rubber plugs! Grease is inserted through zerk fitting on the cap and flows through bearings before exiting rear of hub. Double-lip, spring-loaded seal protects bearings from corrosion.