Camco Aero-flo RV Roof Vent Cover / Black Top with Black Base is designed to allow fresh air ventilation and light into your RV, rain or shine. A swing open design makes cleaning easier. Can be installed easily by mounting to the existing 14" x 14" roof vent. Vent cover made of rugged UV stabilized resin. Hardware included Offers 30 percent more open vent area than other brands Rugged UV stabilized resin Allows high-flow fresh air ventilation and light into the RV Allows you to leave your RV vent open - rain or shine Swing-open design makes cleaning easy by removing the top