CHECK YOUR MODEL NUMBER CAREFULLY to ensure this is the correct filter for your air purifier. This filter is compatible with Core Mini, Core Mini-RF air purifier models, works just like the one that came with the unit. Cost-Effective Price: The value pack saves a lot of money for your year-round air cleaning needs. Top-level filtration performance for extended use, it is recommended to replace the filters every 6-12 months. Using an old filter reduces the effectiveness of your air purifier. 3-STAGE FILTER SYSTEM: The pre-filter, personal HEPA filter, and activated carbon filter work together to reduce airborne particles and unwanted odors in your living space for better air quality. HEPA Filtration: The personal HEPA filter is treated with HEPA Smart technology and meets the High Efficiency Particulate Air standard, trapping at least 97% of airborne particles as small as 0.3 microns. This includes fine dust, smoke particles, and allergens such as pollen and pet dander. Traps Household