Humidifier Filter Replacement for Aprilaire 10 Models 110 220 500 550 558 – 2 Pa
Designed to Fit: Perfectly compatible with Aprilaire humidifiers requiring the #10 filter, including models 110, 220, 500, 500A, 500M, 550, 550A, and 558. Invest in your health and comfort with this essential humidifier filter.