Filter-Monster True HEPA Replacement Compatible with Bissell 2521 Filter for air400 Air Purifiers, 3 Pack

Replacement compatible with Bissell 2521 filter. Engineered to fit Bissell air400 air purifier, series 24791. Pre-filter acts as first layer of filtration to capture larger particles before reaching HEPA filter. Also removes harmful VOCs and household odors from cooking, cleaning, smoking and pets. True HEPA filter captures up to 99.97 percent of airborne particles as small as 0.3 microns in size including smoke, dust, pollen, pet hair and dander, mold spores and dust mites. Recommended to replace HEPA and pre-filter every 6 months for maximum efficiency, or more often depending on air quality and environmental factors. Package contains (3) HEPA filters with (3) attached pre-filters. Dimensions: 15.75 x 13.38 x 1.38 inches each.