Blue Pure 311i+ Max AllergenBlock Replacement Filter Compatible with Blue Pure 311i+ Max Air Purifier, 2-in-1 H13 True HEPA and Activated Carbon Filter

["【Perfect Compatibility】Blue pure 311i+ Max replacement filters ONLY compatible with Blue Pure 311i+ Max Air Purifier. Please confirm your air purifier models before purchasing.","【H13 Grade High Efficiency Filtration】Made from H13 grade filter paper, the Ture HEPA is more than 99.97% efficient in filtering 0.3 micron such as pollen, dust, pet dander, and other tiny particles.","【Activated Carbon Layer】The Activated Carbon Filter swiftly and efficiently tackles household odors from pets, cooking, smoke, wildfires, and VOCs, ensuring a fresher and cleaner indoor environment","【Optimal Maintenance】For optimum performance of your blueair air purifier 311i+ Max, it is recommended to replace the 311i+ Max filter every 6-9 months depending upon the environment and your usage of the air purifier, with premium materials and advanced technology, ideal solution for homes with pets, smokers, open layout kitchens.","【LIFETIME SERVICE】If you have any problems with the filter fitting your air purifier, please contact us through our Amazon home page"]