Piezo Stack Actuator, Fire Alarm Bell manufacturer / supplier in China, offering Piezo Elements Piezo Ceramic Disc for Piezo Switch Piezoelectric Buzzer Elements 10mm 15kHz 6±30% NF FT-10n-15A1-10A, Piezo Elements Piezo Ceramic Disc for Piezo Switch Piezoelectric Buzzer Elements 10mm 15kHz 6±30% NF FT-10n-15A1-10b, Piezo Elements Piezo Ceramic Disc Piezoelectric Buzzer Elements Pzt Piezo Elements for Buzzer & Alarm 50mm 1.0kHz FT-50t-1.0A1-11A and so on.