3-Pack Replacement Blueair 203C Air Purifier Filter - Compatible Blueair 200 & 300 Air Filter

Replacement Blueair 203C Humidifier Filter; Quantity: 3 Replaces Blueair 200 & 300 Air Filter Gradient filter design maximizes airflow while removing harmful particles to 0.1 microns in size For best results; change air filter at least once per season or more often depending on air quality and use. Essential for Allergy Sufferers.