Listing is for 2 filters

Compatibility: 211+ Replacement Filter with Activated Carbon Filter Compatible with Blueair Blue Pure 211+ and Max Air Purifier.

COMPATIBLE MODELS】The premium 211+ replacement filter perfectly compatible with Blueair Blue Pure 211+ and Max Air Purifier. Please confirm your machine model before purchasing, thank you!

【HIGH PERFORMANCE】Our 211+ replacement filter includes 3-Stage Filtration System: Fine Nylon Preliminary Filter, H13 Grade True HEPA Filter and Activated Carbon Filter. 3 layer filtration step help to remove 99.97% of airborne particles down to 0.3 microns, cleaning air and fresh space for your home.