3M LittmannTunable Diaphragm and Rim Cardiology III (Small Side) Black offers the high quality that medical professionals expect and each replacement part and accessory meets the same demanding standards. Conveniently packaged in kits that correspond to the stethoscope models. | Uses: Replacement parts and accessories make repairs simple | Salient Features: Quality and reliability in one convenient package This kit includes the diaphragm and the retaining ring for the pediatric (bell side) diaphragm for the Littmann Cardiology III Stethoscope Simple to follow instructions will help you to fix your stethoscope in no time No need to buy a new expensive stethoscope, you can just replace the diaphragm on your old one and save a lot of money Made from durable materials, this diaphragm will prolong life of your old stethoscope for another 10 years | Directions For Use: Read the user manual carefully | Safety Information: Read the label carefully before use Keep out of the reach of children