Features: 1Applicable Models: High efficiency particle air filter is designed as a replacement part for Blueair PURE 411 air purifier. Accuracy manufacturing perfect fit. 2Particle 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. 3Improved Efficiency: The normal operation of particle air filter is important. Replacing them at regular intervals can effectively improve the working efficiency of the purifier. 4Direct 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. 5Stable Performance: With exquisite workmanship the air purifier filter screen has high filtering efficiency perfect for household use stable and reliable. Specification: Item Type: Air Purifiers Replacement FilterMaterial: high efficiency particulate air filterGross Weight: 261g / 9.2ozApplicable Models: For Blueair PURE 411 Package List: 1 xPurifierParticleAirFilter