PRODUCT SPECIFICATIONS: Package includes 1 diameter stainless steel louvered outdoor dryer vent cover and 4 x installation screw. Find the matching ventilation equipment to build the perfect ventilation system! HIGH QUALITY MATERIALS: Our exterior wall vent hood is made of 304 stainless steel material well-tested by the manufacturer, provide rust and resistance in any weather conditions. The self-closing shutter flaps protect your equipment Safe from annoying rodents like mice, rats, birds, snake and squirrels. In addition you can disassemble the wire mesh for optimal ventilation efficiency WIDE APPLICATION: The louvered vent cover is ideal for vent hose, which allows for maximum exhaust airflow when venting. And perfect for bathroom vents, air conditioning units, kitchen fans & extractors, heat transfer and ventilation systems, gas & electric dryers, cooker hood extractors and all home wall vents, as well as a wide variety of industrial uses EASY TO INSTALL: In order to make the installation easier, we have equipped each vent cover with 4 screws. Just inserting the vent hose into the louvered vent cover, then you only need to mount it with screws and silicon seal. You can also use a marker to record the positions of the 4 screw holes according to the size of the ventilation cover, and use an electric drill to drill the holes. Just minutes to do that, also easy to remove and clean Size:100mm Color:Silver Material:304 Stainless Steel Package Contents: 1 * Metal Dryer Vent Cover Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.