Diaphragm & Retaining Ring Diaphram Size:Adult All you have to do

All you have to do is change the amount of pressure applied on the head—no more flipping it over to listen for different frequencies

and (1) name tag

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Get accurate sound readings and the best possible auditory diagnostics with stainless steel binaural that give you better sound flow

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Diaphragm & Retaining Ring Diaphram Size:Adult All you have to doThis is the Diaphragm on the underside of the Ultrascope acrylic head along with the metal Retaining Ring to hold it in place. If your current Retaining Ring will not stay on, it is more likely an issue with the ring itself rather than the bell. It is a good idea to replace the Diaphragm at the same time. Conversely, if there is a need to replace the Diaphragm, it is also a good idea to replace the Retaining Ring simultaneously. The Adult Size: ~1.