Flintar FLT4825 (Filter B) high-efficiency True HEPA Filtration System is fully compatible with *GermGuardian Air Purifier. This Filtration System contains the following filters: <br> <br> -<b>Activated Carbon Pre-Filter: </b> Traps larger particles in the air like dust, hairs, pet fur, lint, and absorbs household odors from pets, cooking, smoking, and harmful VOC’s <br><br> -<b>True HEPA Filter: </b> Captures 99.97% of airborne particles down to 0.3 microns in size <br> <br> <b>Fully Compatible with the following GermGuardian air purifier models:</b><br> -GermGuardian models: AC4300BPTCA, AC4825, AC4825E, AC4825DLX, AC4850PT, AC4900CA, CDAP4500BCA, CDAP4500WCAAC4200<br> -PureGuardian Model: AP2200CA<br> -Black & Decker model: BXAP148<br> -Oransi model: Finn<br><br><br> Using high efficiency air cleaner filters and replacing the filters regularly will help optimize air cleaning performance. Replace your 3-in-1 True HEPA Filter System every 6 months for optimal performance. <br> Maximize the quality of the air you breathe and maintain the health and comfort for you and your family by using Flintar premium FLT4825 all-in-1 True HEPA replacement filters (Filter B).