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Diaphragm and Rim Assembly
3M36557 Features: -Fits Cardio III, Cardio II SE, Master Classic II, Classic II SE and Select #M stethoscopes. -Assemblies allow for easy replacement of tunable diaphragm and rim on appropriate Littmann stethoscopes. -Patented tunable diaphragm conveniently alternates between the low and high frequency sounds without the need to turn over the chestpiece.