Sharp FZ-N25HFU Activated Carbon Filter and True HEPA Replacement Filter for FP-N25CX Activated carbon filter and true HEPA filter duo pack is compatible with FP-N25CX Activated carbon filter removes odors and captures large particles Activated carbon filter life up to 2 years True HEPA filter captures 99.97% of pollen, dust, pet dander, and smoke particles as small as 0.3 microns True HEPA filter life up to 2 years