Piezo Stack Actuator, Fire Alarm Bell manufacturer / supplier in China, offering Piezo Elements Piezo Ceramic Disc for for Thin Anti-Lost Devices Piezoelectric Buzzer Elements 20mm 3.6kHz FT-20t-3.6A1-11b-White Insulation, Piezo Elements Piezo Ceramic Disc for for Alarm Piezoelectric Buzzer Elements 23.5mm 3.2kHz FT-23.5g-3.2A4-Green Insulation, for Thin Anti-Lost Devices Airtag Multilayer Piezoelectric Buzzer Ceramic Disc Powered by 3.3V Lithium Battery Piezoelectric Buzzer Elements Ftl19n4.8-Y3 and so on.