Item Type: RV Furnace Vent Material: Stainless Steel Set Includes: 2 round mesh covers and 1 square mesh cover and 1 rectangular mesh cover and 2 mounting calipers and 6 springs 2 Round Mesh Covers: 2.8 inches diameter x 1.3 inches height 1 Square Mesh Cover: 4.5 x 4.5 x 1.3 inches 1 Rectangular Mesh Cover: 8.5 x 6 x 1.3 inches 1,Kit Information: Includes 2 round mesh covers, 1 square mesh covers, 1 rectangular mesh covers, 2 mounting calipers, 6 springs, perfect for your application! 2,Security Protection: Large enough clearances both ensure ventilation and avoid the entry of flying bugs, protecting your furnace and fan from pests. 3,Stainless Steel: Heavy duty stainless steel mesh vent screen for maximum strength and longest service life, rust resistant for outdoor use. 4,Precision Craftsmanship: The exhaust vent mesh cover is finely designed to effectively optimize air circulation and provide a more comfortable living environment. 5,Simple Installation: The set is simple in design and easy to install, no professional tools are needed, you can easily install it by yourself, saving time and energy.1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.1 x RV Furnace Vent(12 Accessories) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.