1、Enhanced Structures: The bearings are made of high grade cr steel alloy, which is resistant to wear and damage, ensuring long lifespan in harsh conditions. 2、Grease Retention Design: Spring behind the lip helps retain grease inside the hub, protecting against water and road grime ingress for extended durability. 3、Efficient Axle Support: Kit includes LM12749, LM12710, L68149, L68110 bearings and TB seal for outstanding spindle support, reducing hub friction and enhancing vehicle efficiency. 4、Ideal Replacement: Suitable for specific sizes of axles trailer wheel hub bearing, ideal for rebuilding or replacing old or damaged trailer bearings effectively. 5、Easy Installation: Designed with user convenience in mind, our marine trailer bearing kit is easy to install, saving you time and effort, bring you reliable use.