This BlueAir particle filter fits the following BlueAir units: 400, 401, 402, 403, 410, 410B, 450E, 455 and 455EB. Approximate Size: 21x10x4 1 each - Made by Magnet by FiltersUSA
The Magnet logo on this page signifies that this product is a factory direct replacement to the OEM branded filter.