Kepo piezo elements for audio transducers kepo ft 41t 10a1 478 the keno piezo element 800 o 1 05khz is a 41mm diameter piezo element with a 75000nf30nf capacitance that can be used for a small audio transducer such as a buzzer kepo ft 41t 10a1 478 piezo element 800 ohm 1 05 khz 41mm