STRONG MAGNETIC: The magnetic range hood is made from a thick and powerful magnetic material, making it the only range hood on the market that will never come loose, even above ceiling vents, for the greatest airflow possible!. SAVE ENERGY AND COSTS: Using ceiling vent covers can effectively help you eliminate drafts in unused spaces in your home while significantly reducing heating and cooling costs associated with controlling the temperature of spaces. Keep Small Things Out: With a sensible sealing, floor vent cover will prevent small creatures from crawling out of the vent, giving you peace of mind. It also prevents small items such as pencils, blocks, snacks, small items, pet food, and coins from falling into the vents. MULTIPLE USES: Our magnetic vent covers are versatile and multi-purpose, making them perfect for indoor or outdoor use in and RV. Please use a magnet to check that your vents are made of steel and not aluminum, wood, or plastic. Package Included: This is a set of 6