Kepo piezo elements for audio transducers kepo ft 105t 90a1 462 the keno piezo element 700 o 85 05khz is a 105mm diameter piezo element with a 30000nf30nf capacitance that can be used for a small audio transducer such as a buzzer kepo ft 105t 90a1 462 piezo element 700 ohm 8 9 khz 105mm