PUREBURG Replacement Filter Compatible with Bosch Air 4000 Air Purifier, 2-Pack H13 True HEPA Activated Carbon 2-in-1 For Air Clean Dust VOCs Odor 3-Stage Filtration

["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.)","Compatible with Bosch Air 4000 Air Purifier","H13 HEPA capture up to 99.97% of airborne 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.","Please replace regularly to keep your machine fresh and clean. For the best performance, clean the filter once a month with a soft brush gently or with a vacuum cleaner.","Top Notch Quality Used for Maximum Customer Satisfaction Guaranteed. Every Product made by PUREBURG is Tested through Rigid Examinations and QC Procedures."]