Features 1、Applicable Models: High efficiency particle air filter is designed as a replacement part for Blueair PURE 411 air purifier. Accuracy manufacturing, perfect fit. 2、Particle Filtration: High efficiency particle air filter can effective reduce pollen, dust mites, and other fine allergenic particles, prevent them from circulating in the air you breathe. 3、Improved Efficiency: The normal operation of particle air filter is important. Replacing them at regular intervals can effectively improve the working efficiency of the purifier. 4、Direct Replacement: As part of normal maintenance, the particle filter for air purifier can be easily removed and replaced. Simply replace the old or damaged filter to get a new one. 5、Stable Performance: With exquisite workmanship, the air purifier filter screen has high filtering efficiency, perfect for household use, stable and reliable. Specifications Item Type: Air Purifiers Replacement Filter Material: high efficiency particulate air filter Gross Weight: 261g / 9.2oz Applicable Models: For Blueair PURE 411 Package List 1 x Purifier Particle Air Filter