Fellowes HF-300 True HEPA Replacement Filter for AP-300PH Air Purifier - HEPA - For Air Purifier - Remove Pollen, Remove Allergens, Remove Mold Spores, Remove Dust Mite, Remove Germs, Remove Pet Dander, Remove Smoke, Remove Ragweed, Remove Odor - 99.The Fellowes HF 300 True HEPA Filter captures 99. 97% of particles and impurities as small as 0. 3 microns, including mold spores, pollen, dust mites, most airborne microbes, allergens and cigarette smoke. Filter is compatible with the Fellowes AP 300PH Air Purifier. 9370101