Blueair Classic 400 HEPA Filter

Blueair Classic Air Purifier Filter in White | 21 H x 10 W x 3.8 D in | Wayfair

Blueair 400 Series Replacement Particle Filter

Blueair Air Purifier Replacement Filter 400 Series Genuine Particle Filter; Compatible with Classic Series 402 403 410 450E 455EB 405

Blueair Classic 400 Series Particle Filter

Classic 400 Series Particle Filter