HEPA Air Purifier Replacement Filter B for GermGuardian AC4300BPTCA, AC4900CA, AC4825, AC4825DLX, AC4850PT, CDAP4500BCA, CDAP4500WCA, PureGuardian AP2200CA, Black+Decker Model BXAP14 Please confirm if the filter fit for your air purifier. Fits Air Purifier Models: GermGuardian AC4300BPTCA, AC4900CA, AC4825, AC4825DLX, AC4850PT, CDAP4500BCA, CDAP4500WCA. PureGuardian AP2200CA. Black+Decker Model BXAP14. Including 1 pack of ture HEPA filter and 4 packs of activated charcoal pre-filters. TRUE HEPA FILTER: Reduces up to 99.97 percent of dust, pollen, pet dander as small as .3 microns from the air. Activated Charcoal Pre-Filter: Reduce unwanted odors from pets, smoke, cooking fumes, and harmful VOC's emitted from a variety of household products and chemicals.