Protect your RV's vital systems from unwanted guests with this HQRP Vent Screen Kit! Mice, insects, and other small critters love to crawl into warm, dark spaces like your furnace, water heater, and battery vents to build nests. These nests can block airflow, cause malfunctions, and lead to expensive repairs. This kit includes two different stainless steel mesh screens: a 2.8-inch diameter round cover for many furnace vents (fits most Duo-therm and Suburban models) and a 4.5x4.5 inch rectangular cover for water heater vents (fits Suburban 6, 10, 12-gallon models) and many battery vents. It also fits specific Atwood furnace models. Each screen comes with spring fasteners and a handy installation tool, making it easy to pop them into place over your existing vent openings. The durable stainless steel mesh keeps pests out while allowing proper airflow. It's a simple, affordable bit of preventative maintenance that can save you a huge headache down the road. Before ordering, just double-check your RV's vent make and model to ensure compatibility. Peace of mind for your RV adventures!