Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si [Perfect application] Suitable for most evaporation, ultrasonic humidifiers, cold mist humidifiers, fish tanks and humidifier wick filters. Just put it in the slot and start working. [Excellent performance] Extend the service life of the humidifier filter, keep the water clean, and improve the water quality of the humidifier. [Size selection] The small size is 1.75 x 2.55 inches (approximately 4.4 x 6.4 cm). The diameter of the humidifier opening should be at least 1.8 inches (approximately 4.6 cm). Please check whether the opening size of the humidifier is enough to accommodate this water tank cleaner. [Easy to use and replace] Just put the humidifier cleaning box into the humidifier to keep the water tank clean for longer. Use clean water and replace humidifier cleaner every 30 days. [Value Pack] Make the cleaning effect as gentle as the water on the surface and parts of the humidifier. Function: Humidifier Cleaner colour:Yellow Material:plastic Package Contents: 12 x Humidifier Cleaner Fish Only the above package content, other products are not included. Note: Light 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.