PERFECT FIT - Airmega 230 & 240 max2 filter replacement compatible with Coway Airmega 240 Air Purifier and Coway Airmega 230 Air Purifier(AP-1821F) 3 STAGE FILTRATION SYSTEM - Airmega 230 & 240 max2 replacement filters are made of 3-in-1 filtration systems including Pre-filter, H13 Grade Max 2 Green True HEPA Filter, and Activated Carbon Filter TRUE HEPA FILTER - H13 Grade True HEPA Airmega 230 & 240 max2 Filter helps remove up to 99.99% of particles as tiny as 0.1microns such as pollen, household dust, dust mites, mold spores, bacteria, allergens, PM2.5, etc HIGH EFFICIENCY - Pre-filter traps large particles in the air like hair, pet fur, pet dander and more. The premium activated carbon filters can efficiently absorb terrible odors including Pet odors, Smoke odors, Cooking odors, Harmful VOC's PRODUCT SPECIFICATION - Package contains 2 * Airmega 230 & 240 max2 Filters. Recommended to replace every 6 months for optimal performance.