Introducing our high-quality {H13 True HEPA Air Purifier Filter with Catalytic Activated Carbon Filter, designed specifically for Whirlpool Air Purifier WA-4001FK}. As a leading factory in air purification technology, we have carefully crafted this filter to provide efficient and effective air filtration. Our H13 True HEPA filter captures 99.97% of airborne particles as small as 0.3 microns, including dust, pollen, pet dander, and smoke. The included Catalytic Activated Carbon filter absorbs and eliminates various odors and harmful gases, ensuring clean and fresh air for your home or office. Trust our factory expertise and enhance your air quality with this exceptional filter.