LifeSupplyUSA 1 Air Purifier Filter fits All Blueair 400 Models 400PF, 401, 401PF, 410B, 402, 403, 410 450E, 455, 455EB Fits ALL Blueair 400 Models 400PF, 401, 401PF, 410B, 402, 403, 410 450E, 455, 455EB True HEPA Filter Brand New Individually Sealed By LifeSupplyUSA