The Honeywell HC22A 1007 fits the following humidifier systems:
The humidifier spreads water over the humidifier pad, warm air blows over the water-soaked area and vapor is generated. As the vapor circulates through the house, the relative humidity rises.
Dimensions: 9 13/16 inches x 9 1/2 inches x 1 1/2 inches
The Honeywell HC22A 1007 specifications:
For best results your Honeywell humidifier filter should be replaced at least once per year, preferably prior to the start or end of the heating season.
Price is for 1 filter.