The Power Products Plug Filler Cap is the perfect solution for keeping your vehicle's tank or reservoir clean and secure. It acts as a barrier against dust, dirt and other debris, minimizing fuel evaporation, especially in hot weather conditions. The tight-sealing filler cap ensures a tight and secure seal on the vehicle's tank or reservoir, preventing any leaks or spills that could lead to fuel wastage or environmental hazards. FleetPride is your First Click in Heavy Duty®.