Maintain your electronic stethoscope with a new 3M Littmann Diaphragm for Electronic Model 3200 stethoscope. A diaphragm is a vibrating membrane with a seal which allows medical professionals to hear the heartbeat. This 3M Littmann diaphragm part allows doctors and other health workers to restore their electronic stethoscopes to mint condition, ensuring clear sound transmission. The diaphragm detects high frequencies, while the bell helps when listening to low frequencies. The black 3M stethoscope diaphragm features a professional look and an easy replacement procedure. Extend the usable life of an electronic stethoscope by choosing a fresh diaphragm for optimal sound quality.