This Blue Pure 311i + max replacement filter is ONLY perfect compatile with Blue Pure 311i+ Max Air Purifier, compare to part # F3MAX+.

Our 311i + Max filter replacement made of H13 true HEPA air filter and a high-efficiency activated carbon filter for good clean filtration and performance. It's can attach most airborne particles, like dust, pet dander, pollen, household odors from smoking, cooking and pets.

【SUPERIOR QUALITY】: Blue Pure 311i + Max Replacement Filter for Blue Pure 311i + Max Air Puri-fier is H13 True HEPA certified, effectively capturing a remarkable 99.97% of particles as small as 0.1 microns, and cleans pet dander, pollen, and dust. The activated carbon filter efficiently tackles household odors and harmful gases, safeguards you from household odors

【OPTIMAL PERFORMANCE MAINTENANCE】: For the ongoing top performance of your Blue Pure 311i + Max Air Puri-fier, based on actual usage the filter should be replaced within 9 months