Piezo Stack Actuator, Fire Alarm Bell manufacturer / supplier in China, offering Piezo Elements Piezo Ceramic Disc for Small Buzzer & Piezo Switch Piezoelectric Buzzer Elements 15mm 4.8kHz FT-15t-6.0A1-5, Piezo Elements Piezo Ceramic Disc for for Thin Anti-Lost Devices Piezoelectric Buzzer Elements 15mm 4.8kHz FT-15t-4.8A1-11b-Grey Black Insulation, Piezo Elements Piezo Ceramic Disc for Samll Buzzer Piezoelectric Buzzer Elements 12.5mm 7.5kHz 12±25% NF FT-12.5t-7.5A1-3 and so on.