... ;1000pieces High Quality SWT Piezoelectric Diaphragm for External Drive Main feature of Piezo Ceramic Element:-Extremely ... Applications (Piezoceramics element; Piezo diaphragm, piezo plate)1, For sound making:Clocks,Calculators,Telephones,Washing machines ... piezo ceramic element & Attributive Characters:1, Electrode form/ Modulating: External drive (diode); Self drive (transistor);2, Thickness: Thick ( ...