Blueair 400 Series Replacement Particle Filter for the 400 Series Air Purifiers<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Replacement filter for the Blueair 402， 403， 405， 410， 450E， and 455EB air purifiers</li><li>Captures 99.97% of harmful particles like dust， pollen， and smoke down to 0.1 microns in size</li><li>Patented HEPASilent® technology combines electrostatic and mechanical filtration for high efficiency</li><li>Gradient filter structure resists clogging for maximum airflow and won’t re-release harmful particles</li><li>Made of materials 100% recyclable， and naturally anti-bacterial to prevent mold and bacteria growth</li><li>Fits all Blueair model air purifiers in the 400's</li><li>Bacteria-Resistant filter media</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41ks%2B6CZoGL.jpg" noproxy>