[EXCELLENT PERFORMANCE] Our Demineralization for humidifier was made of Cation Exchange Resin and Activated Carbon, which can effectively reduce mineral buildup and awful odors by absorbing impurities from hard water. Efficiently purify the water [REDUCE THE WHITE-DUST] This demineralization replacement to absorbe the calcium, and magnesium ions and 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 can work with a 0.5-gallon tank or larger. Evaporative / Steam Vaporizer / cool & warm mist humidifiers. Also, it is compatible with most of humidifier, including small / mini / portable / large [VALUE PACKAGE] The package contains 12 packs of humidifier filter replacements. Simply drop 1 Ultrasonic Demineralization Filter into your humidifier tank, you're ready for use. It can be used 30-40 times per depending on the water volume and quality Color:As Shown Material:ABS Package Contents: 12 * demineralized ink cartridges Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.