3m Littmann Tunable Diaphragm and Rim Assembly - 36554 - Black Rim, Master Cardiology

3MTM Littmann 36554 Black Tunable Diaphragm and Rim Assembly. These assemblies allow for easy replacement of the tunable diaphragm and rim on appropriate Littmann stethoscopes. The tunable diaphragm allows the user to conveniently alternate between the low- and high-frequency sounds without turning over the chestpiece. Tunable Diaphragm and Rim Assembly for Littmann Master CardiologyTM Stethoscope.