apsonic can provide a variety of ceramic rings for ultrasonic transducers.
Ceramics rings for ultrasonic converter
Size Manufacturer Material 25 x 10 x 4apsonic special Sonox P8 30 x 10 x 5apsonic special Sonix 850 x 20 x 6apsonic special Sonix 850 x 20 x 5apsonic special Sonox P8