Piezo Stack Actuator, Fire Alarm Bell manufacturer / supplier in China, offering Ultrasonic Transducer Piezo Ultrasonic Atomizer Ultrasonic Atomizing Transducer with 113kHz. 135kHz, 1.7MHz, 2.4MHz by Size 16mm, 20mm, 25mm Whtf113-16D-5 (10), Ultrasonic Transducer Piezo Ultrasonic Atomizer Ultrasonic Atomizing Transducer with 113kHz. 135kHz, 1.7MHz, 2.4MHz by Size 16mm, 20mm, 25mm Whtf113-16D-4 (10), Ultrasonic Transducer Piezo Ultrasonic Atomizer Ultrasonic Atomizing Transducer with 113kHz. 135kHz, 1.7MHz, 2.4MHz by Size 16mm, 20mm, 25mm Whtf113-16D-3 (10) and so on.