Usage Tips:CAREFULLY CHEK YOUR MODEL NUMBER to be sure this is the right filter for your Air Purifier. This filter is compatible with for air purifier models Core Mini,Core Mini-RF, Work just like that come with unit. Cost-Effective Price: Value pack save much cost for your all year round air cleaning need. Higher level filtration performance for long time using, It is recommended to replace filters for every 6-12 months. Using an old filter lowers your air purifier's efficiency. 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 improved 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 0.3 Micrometre in size. This includes fine dust, smoke particles, and such as pollen and pet dander. TRAP HOUSEHOLD ODORS: The Activated Carbon Filter physically adsorbs smoke, cooking smells, pet odors, and fumes, making it perfect for pet owners, smokers, and people who live in cities.No more cutting for HEPA filter. Replacement your old filter without others tool, save your time and convenient. Colour: white Material: composite material Package Contents: 1 * Air Purifiers Filters Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.