The disposable Essick Filter for MoistAIR Humidifiers fights mold and mildew, has antimicrobial properties and features Trapmax particulate trapping technology, Filters microbes, particulates and other impurities from humidifier water, For use with MoistAIR humidifier models MA0950, MA1200 and MA1201, Specially treated to resist mold and mildew, Virtually eliminates white dust, Disposable, Use of water softner voids warranty, Air Treatment Product Type : Humidifier Accessory, Color : White, Depth: 1", Height: 8", Width: 31, 75", SKU: ESCK421