Prepare your semi truck to be Ready for the Road Ahead™, with the Stemco 330-3009 6-Hole Hub Cap Gasket that provides enhanced protection for wheel hubs. To lock out dirt, oil, grime, and other contaminants, this replacement gasket uses a specialized composition with a tight-fitting form. Engineered with a multipurpose design to be suitable for both vehicles and trailers. FleetPride is your First Click in Heavy Duty®.