Introducing the H13 True HEPA Air Purifier Filter with Catalytic Activated Carbon Filter, specifically designed to fit the Whirlpool Air Purifier WA-4001FK. Our factory produces high-quality air purifier filters, made from premium materials that effectively remove odors, allergens, and other pollutants from the air. The H13 True HEPA filter captures 99.97% of airborne particles as small as 0.3 microns, while the catalytic activated carbon filter removes common household odors. This ensures that the air you breathe is clean and fresh, promoting a healthier living environment for you and your family. Trust our factory to deliver exceptional air purification products that provide maximum efficiency and performance.