As part of ProTeam's Four Level Filtration system, this commercial-grade dome filter made from HEPA is essential to improving Indoor Air Quality. To safeguard the Indoor Air Quality of your facilities and to optimize the performance of your vacuum cleaner, only use genuine ProTeam filters. - Fits: Fits all Backpacks except TailVac, Super Coach Pro, GoFreeFlex Pro and ProVac FS 6, Easily Replaceable - ProTeam dome filter is easy to remove and replace. Dome Filter Actual vacuum efficiency performance varies depending on which unit, please see reference chart. Partners in an educational campaign about Indoor Air Quality issues. The American Lung Association does not endorse products.