Rajasthani Ceramic 16 mm Ultrasonic Mist Maker Fogger Discs for Humidifier Parts This is 20 mm ultrasonic mist maker fogger ceramics discs with wire and sealing ring new î¦20mm ultrasonic mist maker fogger ceramics discs with wire and sealing ring diameter: 20mm thickness: 1.24 0.01mm frequency: 1.7mhz quantity: this mist disc can not be connected with power directly, it needs a separate driver "circuit" we are not responsible for any experiments done, burn, blast, broken disk "due to experiments" will not be replaced.