12 Pack Demineralization Cartridge Compatible with HoMedics Ultrasonic Humidifiers, Filters Mineral Deposits, Prevents Hard Water Build-Up FITS HUMIDIFIERS: These filters compatiable with Homedics UHE-CM65, UHE-WM70, UHE-OC1, UHE-CM45B, UHE-CM25, UHE-WM16, UHE-OW14, UHE-WM85. Compatible with all HoMedics 1-gallon or larger ultrasonic humidifiers. Compare to demineralization cartridge UHE-HDC4. Fit evaporative, Warm & Cool Mist Ultrasonic Humidifier, most humidifier, such as Vicks, LEVOIT, Honeywell, Homasy. REDUCE THE WHITE-DUST: The ultrasonic filter helps to prevent the build-up of white dust caused by minerals and chemical in hard water, this hard-water dust can contain calcium, lime or magnesium. These Demineralization Filters can help extend the life of your humidifier motor and tank by purifying the water inside and keeping it clean. EASY TO INSTAL: Simply drop 1 Ultrasonic Demineralization Filter into your humidifier tank to begin enjoying clean, pure mist. Replace cartridge every 30 to 40 fillings, depending on the water hardness.