This is the finest quality replacement Whirlpool 1183054K True Hepa Filter, designed to captures 99.7% of particles as small as 0.3 microns from passing through the air, including dust, pollen, and smoke. Includes 4 pre-carbon filters (one-year supply). Use this item with Whirlpool air purifier models AP450 and AP510. This is NOT genuine Whirpool, but a high quality replacement. This is not a Whirlpool® OEM product and is not covered under any Whirlpool® manufacturer's warranty. The Whirlpool® brand names and logos are the registered trademarks of their respective owners. Any use of the Whirlpool® brand name or model designation for this product is made solely for purposes of demonstrating compatibility.