12mm 40khz receive Ultrasonic Sensor 1. Diameter:12mmSENSOR; 2. Height:9.5mm; 3. ... COSSON ELECTRONIC TECHNOLOGY (HK) CO., Ltd). specialize in producing electro-acoustic components such as buzzer(Piezo electric, electromagnetic, mechanical), ... piezoelectric ceramic element, SMD magnetic transducers, condenser microphones, ultrasonic sensor,Atomization piece, speakers and other audio components. And our ...