Humidifier Circular Wick Filter fits Holmes models HM1645, HM1730, HM1745, HM1750 and HM2200. Fits Duracraft models DH-888 and DH890. Honeywell model HCM-890. Hamilton-Beach models 05520 and 05521. White-Westinghouse model WWHM1645. Measures 6 1/2 inches tall. generic filter is made by RPS Products.