3M Littmann Stethoscope Spare Parts Kit, Master Cardiology, Black, 40011 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 Tunable diaphragm technology provides clinicians hear different frequency sounds by simply adjusting the pressure on the chestpiece Snap tight, soft sealing eartips conform to individual ears for an excellent acoustic seal and comfortable fit Eartips snap firmly onto the ends of the eartubes, requires a significant effort to remove Contains: one tunable diaghragm and rim assembly for the stethoscope chestpiece, Black | Directions For Use: Hold the chestpiece with light pressure to hear low frequency sounds and press a little more to hear higher frequency sounds | Safety Information: Read the label carefully before use Keep out of the reach of children