The National 4.688" OD Fluoro-Elastomer Wheel Seal is designed to provide superior performance and long life in extreme temperature applications. This seal is made from a durable fluor-elastomer material, designed to provide a tight seal that will keep out dirt, dust and other contaminant. The seal is designed to withstand extreme temperatures and provide superior performance in the most demanding applications. It is also designed to provide superior protection against wear and tear, ensuring the product lasts longer in service. FleetPride is your First Click in Heavy Duty®.