new and high quality. Made of high-quality materials, more durable. This tank reduces up to 99% of odor causing, unsightly mold, and algae growth. This Humidifier Demineralization Cartridge helps to prevent and reduce the white dust caused by minerals in hard water. This hard water dust can contain calcium, lime, or other minerals. The demineralization filters can help extend the life of your humidifier, purifying water and preventing odors. Demineralization Cartridge works for UHE-CM65, UHE-WM70, UHE-OC1, UHE-HDC4, UHE-CM45B, UHE-CM25, UHE-WM16, UHE-OW14, UHE-WM85. Fits evaporative, warm and cool mist ultra humidifiers. The filters work with all 1-gallon or larger ultra humidifiers. Each demineralization cartridge lasts for 30-40 full tank uses. Just drop one humidifier charcoal filter into your humidifier tank and it will begin to work. One humidifier filter can be used in humidifiers with a tank up to one gallon in size. Replace every 30-60 days. Color: as shown Material: Plastic Size: 4.57 x 2.28 cm Package Contents: 10 x Humidifier Tank Cleaning Cartridge Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item to appear slightly different from the real thing. Measurement allowed error is +/- 1-3 cm.