Protect your camper's interior from rain damage while allowing your MaxxAir RV roof vent to remain open. Allows constant air flow through your RV to stop heat buildup. Musty air, heat, smoke, and cooking odors escape while rain stays out. Features MaxxAir Vent's exclusive Zero-Leak™ Mounting System that eliminates the need to drill any holes in your RV’s roof surface. Maxxair Vent Cover mounts to most popular 14" x 14" standard roof vents. Six-year limited warranty.