4 Inch Plastic RV Air Vent Louver Black Weather Resistant Boat Yacht Ventilation Grille for Optimal Airflow Features： 1、Versatile Use: Specifically designed for RVs and yachts, this boat louver vent cover promotes air circulation to maintain an refreshing living environment inside the vehicle or boat. 2、Sturdy Material: Made of high strength and robust plastic material, the plastic louvered vent cover resists erosion and withstands harsh weather conditions and marine environment. 3、Stylish Look: The air vent outlet louver cover features modern design that seamlessly blends and enhances the overall aesthetics of different styles of RVs and yachts. 4、Enhanced Airflow: Emphasizes optimal airflow. The air vent cover serves to maintain appropriate inside conditions, preventing dampness buildup and facilitating improved air movement. 5、Easy Installation: The ventilation grille cover features simple and convenient installation without hassle, no complex tool or special steps required, saving your time and effort. Specification： Item Type: RV Air Vent Louver Material: Plastic Size: Approx. 4inch / 102mm Hole Diameter: Approx. 102mm / 4in (Round） Mounting Hole Size: M4 Fitment: Suitable for RVs, yachts, etc. Can be installed if the size is appropriate. Package List： 1 x Air Vent Cover