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 - 99.97% Particle Removal Efficiency Particles - 16.3 Height x 12.6 Width x 1.2 Depth - Microfiber Glass