This universal double lip grease seal will fit all Lippert, Dexter and Al-Ko trailer axle hubs where the grease seals have an inside diameter (ID) of 2.855" and outer diameter (OD) of 3.88". It is important to properly maintain and replace your trailer axle grease seals to prevent grease leakage and bearing failure. These grease seals are made for axle capacities up to 10,000 lbs. Our replacement double lip grease seals will protect your RV's axle hub from dirt, debris and outdoor elements. As an exact-match part, this kit installs just like your original equipment, and is made to enhance your trailer's axle system. This is a replacement double lip grease seal. Please reference your original equipment label before purchasing.