Kepo piezo elements for audio transducers kepo ft 36t 26a1 477 the keno piezo element 500 o 26 03khz is a 36mm diameter piezo element with a 25000nf30nf capacitance that can be used for a small audio transducer such as a buzzer kepo ft 36t 26a1 477 piezo element 500 ohm 26 03 khz 36mm