Product Name: Set of 3 Deluxe 500 600 Series Blueair Air Purifier Filters with Built In Odor Neutralizing Particle Pre Filter; Fits Blueair 501 503 550E 601 603 650E mod
Set of 3 Deluxe 500/600 Series Blueair Air Purifier Filters with Built-In Odor Neutralizing Particle Pre-Filter; Fits Blueair 501, 503, 550E, 601, 603, 650E models and ALL Blueair 500 & 600 Series