Holmes HWF55 Humidifier Filter 2 Pack (Aftermarket) Fits Holmes humidifier models HM-250, 405, 406, 1000, 1025, 1050, 2000. 2 filters per box. Measures approximately 7 1/4" x 8 1/2" x 1 5/8" Holmes humidifier wick replacement filters. This is an aftermarket filter.