LifeSupplyUSA True HEPA Replacement Filter for GermGuardian FLT4825 FLT-4850 AC4800 4800 Series, Germ Guardian Filter B Filter to replace FLT 4825 FLT-4850PT AC4800 Series Filter B Photocatalyst and charcoal filter decompose odor molecules Captures particles as small as 0.3 microns from the air passing through the filter (smoke, dust, pet dander, pollen, fabric and other allergen air borne elements) Brand New Individually Sealed By LifeSupplyUSA