[EXCELLENT PERFORMANCE] Our Demineralization cartridge for humidifier was made of high-quality Cation Exchange Resin and Activated Carbon, which can effectively reduce mineral buildup and eliminate awful odors by absorbing impurities from hard water. Efficiently purify the water [REDUCE THE WHITE-DUST] This demineralization cartridge replacement aims to absorbe the calcium, lime and magnesium ions and eliminate white-dust in hard water. It prevents mineral residues from pooling on furniture and bedding, creating a healthy and comfortable environment. Keep your humidifier running efficiently, extending its service life [FIT MOST HUMIDIFIERS] This humidifier water cartridge can work with a 0.5-gallon tank or larger. Ultrasonic / evaporative / Steam Vaporizer / cool & warm mist humidifiers. Also, it is compatible with most brands of humidifier, including small / mini / portable / large [VALUE PACKAGE] The package contains 20 packs of humidifier filter replacements. Package Dimensions: 5.5"L x 4.7"W x 1"H. Simply drop 1 Ultrasonic Demineralization Filter into your humidifier tank, you're ready for use. It can be used 30-40 times per cartridge depending on the water volume and quality [SERVICES] We have two types of cleaning cartridges in our store. One is an antibacteril cartridge - for preventing g erms growth. And the other one is a demineralization cartridge - for softening hard water and eliminating white dust. Both of them can be used together if necessary. If you have any questions, please feel free to contact us at any time