CLICK HERE TO SEE ALL GENERALAIRE PARTS Generalaire GA-19 Evaporator Pad Features: Super absorbent coating for maximum water distribution. Genuine OEM product. It is recommended you replace your humidifier filter at least once per year for optimal performance. Specifications: Size: 11-5/8" X 9-3/4" x 1-1/2" For use with these models: Generalaire: 900 900XM 1000 1000XM