- COMPATIBLE：Compatible with Blueair Blue Pure 411a Max and 411i Max Air Purifier. Premium Blue Pure F4MAX Replacement filter for 411 Max Series. Not compatible with 411, 411+ and 411 Auto.
- 2-IN-1 Filtration：These filter for Blueair Blue Pure 411i Max and 411a Max Air Purifier combined with 2-IN-1 HEPASilent and Carbon dual filtration technology, delivering more clean air faster and using less noise and energy than HEPA filtration alone.
- PREMIUM F4MAX FILTER: The HEPA filter take out at least 99.97% of particles down to 0.1 microns such as pet dander, pollen, dust, common pollutants, and fabric fibers; The carbon filter take up household odors from smoking, pets and cooking.
- PREMIUM QUALITY：We deliver high quality and durable filter for 411i Max and 411a Max Air Purifier, allowing the filter to last longer. In order to improve the performance of the air purifier, please replace the filter every 6 monthes
- CUSTOMER SERVICE: Package include 2 * F4MAX Filter for Blueair 411i Max and 411a Max Air Purifier. We value customer service and satisfaction. If you have any problems with the filter fitting your air purifier, please contact us through our Amazon home page.
