Features： 1、LONG LASTING DURABILITY: Designed with high strength stainless steel for maximum strength and oxidation resistant, this vent screen is built to last and withstand the elements. 2、PREVENT FLYING OBJECTS: Designed to keep flying animals out and protect your RV from wasps, mud dauber nests, birds, and rodents, this screen is recommended for RV enthusiasts. 3、CLEAN AIR ACCESS: Small mesh design prevents flying animals from entering your RV while allowing clean air to flow through. Breathe easy and enjoy the outdoors without worrying about flying animals. 4、STRONG COMPATIBILITY: Includes 1 piece of 6.0 x 8.6 x 1.3 inches and 1 piece of 4.5 x 4.5 x 1.3 inches RV vent screen. Suitable for outside RV furnace, water heater, or battery vents. 5、EASY INSTALLATION: Includes installation tool for quick and easy setup. Replace the old and damaged ventilation cover and upgrade your RV furnace in just a few minutes. Specification： Item Type: RV Furnace Screen? Material: Stainless Steel Large Size: Approx. 6.0 x 8.6 x 1.3in / 15.24 x 21.84 x 3.3cm Small Size: Approx. 4.5 x 4.5 x 1.3in / 11.43 x 11.43 x 3.3cm Function and Application: This easy to install screen will help ensure that your furnace or water heater vent?are protected from harmful flying?animals, it comes with two springs and a tool to connect the springs to any vent, with installation taking no more than one or two minutes. Fitment:?Suitable for outdoor RV furnace, water heaters or battery vents, so you can replace the vent cover with this equivalent part Package List： 1 x Set of RV Furnace Screen(8PCS)