seal360 magnetic vent cover (1 piece), pockets for complete seal, 5.5" x 12" (brown) for floor, wall, or ceiling vents and air registers, for rv, home hvac and ac vents, vent not included seal360 seal360- command your air<br> <br>with a proprietary, pocketed design, our cover ensures that you'll get the best possible seal with your vent:<br> <br>‣ stop losing money from leaky vents that you thought were "shut off"<br> <br>‣ redirect and boost the supply of hot or cold air to the rooms you actually use without having to buy costly, external magnets that other vent covers require to keep down.<br> <br>‣ silence that pesky noise coming out of your vents.<br> <br>‣ improve duct cleaning by creating a stronger negative vacuum pressure<br> <br>