Equip your semi truck's wheels to be Ready for the Road Ahead , with the Stemco 342 Series Grease 6-Hole Hub Cap, a key component that protects against oil, debris, and dust. Due to its exterior cover that guards against harmful roadside materials, this removable hub cap is the ideal choice to protect a wheel's lug nuts, bolts, and axles. Engineered with resilient metals and an ergonomic design for an easy-to-install or remove procedure. FleetPride is your First Click in Heavy Duty .