General 65-5 Humidifier Filter

From AirFilters.com

GeneralAire humidifier filters (evaporator sleeves). Fits GeneralAire power humidifier (drum type) models 65 and 67. Measures approximately 7"" H x 7"" ID x 20 1/2"" OD x 3/4"" Thick. Removes all minerals from the water it evaporates! Minerals are left on the evaporator sleeve and are not blown into the airstream to collect in the living area. For optimum performance, replace filter every two months or, in hard water areas, more frequently if necessary. AirFilters.com General humidifiers are built to be efficient at releasing humidity into your home.