2 Pack Blue Pure 311i Max AllergenBlock Filter Compatible with Blue Pure 311i Max, Activated Carbon Filters

PERFECT FITThe filter is ONLY compatible with Blueair Blue Pure 311i Max Air Purifier (F3MAX) | NOTENOT compatible with Blue Pure 311, 311 Auto, 311i+ Max air puri-fier, please check the model number before placing your order | AllergenBlock DesignEffectively traps more than 90% of AllergenBlock particles. In addition to efficient performance, it can also save up to 10% of automatic delivery filters and extend machine life | 2-STAGE FILTRATIONOur 311i max filter is designed in 2-in-1 Filtration. With air filter and high-efficiency activated carbon filter for good clean filtration and performance | SUPERIOR QUALITY311i Max replacement filter is made of high-quality non-woven activated carbon and can adsorb 99.99% of air particles (with a diameter as small as 0.03 micrometers)