Kepo piezo elements for audio transducers kepo ft 215t 50as 467 the keno piezo element 150 o 5 1khz is a 235mm diameter piezo element with a 80000nf30nf capacitance that can be used for a small audio transducer such as a buzzer kepo ft 215t 50as 467 piezo element 150 ohm 5 1 khz 235mm