Generaliaire/Aprilaire 4004 Humidifier In-Line Strainer
For use with models: 110, 112, 220, 224, 350, 360, 400, 440, 445, 445A, 445-A, 448, 550, 550A, 550-A, 558, 560, 560A, 560-A, 568, 600, 700, 760, 760A, 760-A and 768