Kepo piezo elements for audio transducers kepo ft 20t 65a1 466 the keno piezo element 300 o 65 05khz is a 20mm diameter piezo element with a 30000nf30nf capacitance that can be used for a small audio transducer such as a buzzer kepo ft 20t 65a1 466 piezo element 300 ohm 65 05 khz 20mm