Whole house humidifier filter (AKA water panel, water pad, evaporator pad). Universal replacement for many brands and models. Approximately 9-1/2" W X 9-3/4" H X 1-1/2".
Replacement for part # X2660. Humidifier Pad for Healthy Climate Humidifier Models HCWB2-12 and HCWB2-12A. Size: 9-1/2 x 9-3/4 x 1-1/2