... , computers, calculators, telephones, electronic and toys . One.Piezo Ceramic Element Applications1. For sound making:Clocks,Calculators,Telephones,Washing machines,Various ... 8mm,Biggest is 65mm;Producttype according to type of metal plate:Brass,Nickel,Stainless steel,FerrieThree.Diaphragm Feature:1.Exetremely ... temperature for soldering a lead wire to a metal plate is 340°c±10°c for 1-2 second ...