DustChek Vent Filtration Kit Stops Dust From Coming Into The Room. A simple and basic environmental control for any room, these high-grade polyester filters remove the dust coming out of the duct work. House dust is loaded with invisible allergens that find their way into your room from other areas of the house via the duct work. To install, simply cut the filter media to the size of the incoming air vents in your bedroom and attach onto the installation strip that is included with the kit. In just a few weeks, you'll see plenty of trapped dust, dirt and lint you might have otherwise inhaled. The filter media is much better and more economical than other methods such as cheesecloth or gauze. DustChek vent filters also help to improve the performance of room air cleaners. The kit includes a roll of filter material 16 inches wide by 5 feet long and comes complete with a 30 installation strip. On a normal size register, this should be enough filter material for twelve monthly changes. Buy 4 or More for price... More Info