Tier1 Humidifier Filter Replacement for Water Panel 10 Aprilaire Models 110, 220, 500, 550, 558 - Improves Air Quality in Homes and Offices - (2 Pack)

Designed to Fit: Fits Aprilaire humidifiers requiring the #10 filter, models 110, 220, 500, 500A, 500M, 550, 550A, and 558, Actual Size: 9-1/2 inches (height) x 10 inches (width) x 1-1/2 inches (depth), High Efficiency Filtration: Reduces pollutants from the water used in your humidifier to produce better air quality, Great for home use., Compatible Design: Comparable replacement filter that improves air quality.