BestAir Replacement Water Pad For Aprilaire 110, 220, 550, 550A, 558;

Unique clay solutions allows for the best water absorption and humidity output in the industry. Surface treated with Micro-Free anti-microbial coating to protect against contaminants and bacteria.
Water pads are crafted to generate higher output and stronger absorption
For best results change once per season
For a healthier home environment