3M Filtrete Eureka HF-7 HEPA Vacuum Filter Nullify Imported Fits vacuum models EUREKA* 2270 Series; Contour Maxima* and Powerline* (2900-2920 Series); EZ Kleen*, SurfaceMax*, 200 and 300 (2940, 2960, 2970 Series) and Select Whirlwind*, Whirlwind Plus*, Pet Lover, Pet Expert* and Clean Living (3270, 3280 Series) Uprights. HEPA filters are designed to meet industry recognized HEPA Standards. HEPA filters help trap 99.97% of all airborne pollutants 0.3 microns or larger, including household dust, pet dander, grass and ragweed pollen, dust mite debris and other microscopic allergens. Vacuum Filters should be replaced every 30 to 60 days for optimium performance. All vacuum brand and model names are registered trademarks of vacuum manufacturers.