LifeSupplyUSA 3 Air Purifier Filters fits ALL Blueair 400 Models 400PF, 401, 401PF, 410B, 402, 403, 410, 450E, 455, 455EB 3 True HEPA Filters Fits ALL Blueair 400 Models 400PF, 401, 401PF, 410B, 402, 403, 410 450E, 455, 455EB; Designed to filter smoke, dust, pet dander, pollen, mold pores, fabric and other allergen air borne elements. Brand New Individually Sealed By LifeSupplyUSA