1.2-Pack, 3-Stage Filtration H13 HEPA Filters (A replacement filter is a combination unit that contains the mesh pre-filter, High-efficiency HEPA filter, and activated charcoal all in one.) 2.Compatible with MEGAWISE EPI235A (2022 Updated Version) Air Purifier HHAP0006-1 ( Fits after 21st Nov 2022) 3.H13 HEPA capture up to 99.97% of PM2.5 particles as small as 0.3 microns. This includes dust, pet dander and other minute particles ,Activated Carbon reduce Chemicals VOCs, tobacco smoke,PM2.5,common household bad smell, Fine Mesh Layer Prevents large particles such as dander,Pet hair 4.Please replace regularly to keep your machine fresh and clean. For the performance, clean the filter once a month with a soft brush gently or with a vacuum cleaner. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.