Amazon.com: MaximalPower Replacement HEPA Filter for Blueair 400 Series Air Purifiers | Compatible with Classic Air Purifier Models 402, 403, 405, 410, 450E, 455EB, 480i : Home & Kitchen
Filter Bros BA-400 Compatible With BLUEAIR 400 Classic Series HEPA Replacement Particle Filter For 480i, 402, 403, 405, 410, 450E, 455EB - Walmart.com