Description: 【Comprehensive Set】: This package includes a complete set of screens and installation tool and Silicone Rubber 【Versatile】: Designed to fit most water heaters and furnace vents, the set includes square round and rectangular screens specifically for double heat and furnace vents 【Stainless Steel Mesh】: Made from stainless steel mesh, these RV Bug Screens are built to last. They resist corrosion effectively, protecting your investment while maintaining a sleek appearance that is easy to clean 【Easy Installation】: The package comes with spring hooks and an installation tool for easy setup. Additional hooks are provided to ensure secure attachment and ease of future use 【Premium Materials】: Constructed from stainless steel and silicone rubber, this RV Furnace Vent Cover offers durability and flexibility, making it a reliable choice for long term use in various weather conditions Size Chart: Rectangular 21.6cmx15cmx3.4cm/8.50inchx5.91inchx1.34inch Square 11.7cmx11.7cmx3.2cm/4.61inchx4.61inchx1.26inch Round 7.2cmx3cm/2.83inchx1.18inch Spring Fasteners 2.5cm/0.98inch Installation Tool 13.4cm/5.28inc Package Includes: 1 Rectangular RV Furnace Vent Cover 1 Square RV Furnace Vent Cover 2 Round RV Furnace Vent Covers 6 Spring Fasteners 1 Installation Tool Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.