1、APPLICABLE MODEL: The activated carbon filter screen is suitable for Blueair Blue Pure 211 air purifier and can directly replace the old or damaged filter element. 2、ACTIVATED CARBON: The filter screen adopts excellent activated carbon particles, which can reduce smoke, odor and harmful substances, safe and reliable. 3、FOLDABLE DESIGN: The filter element of the air purifier is foldable design, which is convenient for installation and storage and greatly saves storage space. 4、EASY TO REPLACE: The foldable filter screen has reasonable size, convenient and practical to remove the old filter element and replace it with a new one. 5、HIGH EFFICIENCY: With exquisite workmanship, the air purifier filter screen has high filtering efficiency, perfect for household use, stable and reliable.