FilterBuy Holmes HWF65 & H65-C Humidifier Wick Replacement Filters. Designed to Replace Holmes Part # HWF-65. Pack of 4. Pack of 4 FilterBuy HWF65 Holmes Replacement Humidifier Wick Filters. Aftermarket replacement filter manufactured by FilterBuy. Designed to fit models HM1800, HM1840, HM1845, HM1850, HM1851, HM1855, HM1865, HM1888, HM1889, HM1895, HM1975, HM2059, HM2060W, HM2090, HM3000, HM3800, HM3850, HM7600, and HM4000. This humidifier filter is designed to prevent growth and migration of mold, fungus, algae, and bacteria. Premium aftermarket replacement, designed by FilterBuy in the USA. FilterBuy: Breathe Better!