Blue Pure 411i Max and 411a Max Replacement Filter

Blue Pure 411i Max and 411a Max Replacement Filter Compatible with Blueair Air Purifier 411i Max and 411a Max, Blue Pure F4MAX, Particle and Activated Carbon, 2 Pack COMPATIBLE：Compatible with Blueair Air Purifier Blue Pure 411i Max and 411a Max. Premium Blue Pure F4MAX Replacement filter for 411 Max Series. Not compatible with 411, 411+ and 411 Auto. 2-IN-1 Filtration：These...