1.[Compatible Devices]The premium PU-P05/AC201B replacement filter compatible with FULMINARE PU-P05 and Purivortex AC201B Air Purifiers. Works like original, NOT FIT for FULMINARE T10 Air Purifier, please check your purifier model before making an oder. 2.[3-in-1 Filtration System]Our PU-P05/AC201B filters adopt 3-in-1 HEPA filtration technology, which includes a fine preliminary filter, H13 True HEPA Filter, and Activated Carbon Filter. 3.[H13 GRADE TRUE HEPA FILTER]H13 grade true hepa filter effectively clean up nearly all kinds of airborne particles as small as 0.3 microns, as well as unwanted odors, including pet dander, dust, PM2.5, pollen, smoke, tiny particles, and VOCs. 4.[COST-EFFECTIVE PACKAGE]Get 2 Packs of PU-P05 Replacement filters at a cost-effective price, providing significant savings on your yearly air purification needs. It's recommended to replace every 3-6 months, depending on the air quality in your area and the use of the Air Purifier to ensure optimal performance.