Blue Pure 121 Replacement Filter, Extra Protection Particle and Carbon, Fits Blue Pure 121 Air Purifier, by Blueair

BLUEAIR Blue Pure 121 Genuine Replacement Filter, Extra Protection Particle and Activated Carbon, Fits Blue Pure 121 Air Purifier

BLUEAIR Blue Pure 211+ Genuine Replacement Filter, Particle and Activated Carbon, Fits Blue Pure 211+ Air Purifier (Non-Auto)

BLUEAIR Blue Pure 411 Auto, 411, 411+ Genuine Replacement Filter, Particle and Activated Carbon, fits Blue Pure 411 Auto, 411 and 411+ Air Purifiers