Our 10500 true HEPA filter replacement Kit is designed specifically compatible with Honey-well 10500 (EV-10), 17000, 17000-S, and 17005 air Cleaner purifiers, Compared to Part Number 20500. Multi-Stage Filtration System: Pre Filter: Filters larger particles in the air like dust, hairs, pet fur, lint, and prolongs the life of HEPA filter. True HEPA Filter: Efficiently filter up to 99.97% of airborne particles as small as 0.3 microns, including dust, pollen, pet dander, and more, ideal for families with open kitchen, pet owners, or smoking household. High-Efficiency Activated Carbon Filter: Filters various household odors from pets, cooking, smoking, and VOCs. Package Contains 1 x HEPA Filter + 2 x Wrapping Carbon Pre-Filters Warm Tips: Please replace regularly to keep your machine fresh and clean. For the best performance, it's recommended to replace it every 6-8 months depending on the usage and circumstance. NOTE>> This is not OEM products. Any brand names and logos are the registered trademarks of their respective owners. Any use of the brand name or model designation for this product is made solely for purposes of demonstrating compatibility.