... 2,Use: For Ultrasonic Equipments 3,Clear sound / High sound pressure 4,MOQ;1000pieces High quality Piezoelectric Ceramic For Ultrasonic Equipments ... (Piezoceramics element; Piezo diaphragm, piezo plate)1, For sound making:Clocks,Calculators,Telephones,Washing machines,Various(Burglar ... Dimension: Smallest diameter is 8mm, Biggest is 65mm;4, Metal plate types: Brass, Nickel, Stainless steel;5, Connection ...