Outfit your semi truck's wheels to be Ready for the Road Ahead with enhanced protection against dust, debris, and oil, with the SKF Oil Fill 6-Hole Hub Cap. 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. Constructed with sturdy metals and a streamlined design for an easy-to-install or remove process. FleetPride is your First Click in Heavy Duty .