ALEKO RV Air Vent has a sleek aerodynamic design made to reduce wind resistance, creating maximum air ventilation. Specially made to be weather and water resistant for the best use. Perfectly fits the most popular sized RV vents. Don't let your RV get stuffy, with this vent cover, you can get maximum fresh air circulation, rain or shine. Easily installs over your RV vent, preventing pests from getting in while circulating fresh air in and out of your Recreational Vehicle.