Duracraft AC-814 Humidifier Wick Filter (Aftermarket) Fits Duracraft Natural Cool Moisture Humidifier models DH836, DH837, DH837B, and DH950. Duracraft humidifier wick replacement filters. Measures approximately 5 1/2" x 6" x 1 1/2". High performance, high output! This is an aftermarket filter.