Replacement Particle Filter Compatible with ALL Blueair 400 Series Air Purifiers.
Fits the following Blueair 400 Classic Series Air Purifiers: 400PF, 401, 401PF, 410B, 402, 403, 410 450E, 455, 455EB.
True HEPA filtration captures particles as small as 0.3 microns from the air passing through the filter, resulting in cleaner and more breathable air.
For maximum efficiency, it is recommended replacing filter every 6 months (dependent on air quality and use).
Approx. Dimensions: 4 x 10 x 21 inches - By LifeSupplyUSA.