Get improved acoustics and updated design features from the 3M™ Littmann® Cardiology IV™ 22" Stethoscope. Adjust your level of pressure on the adult or pediatric side of this one-piece diaphragm to hear the faintest high-frequency sounds. Get improved acoustics and updated design features from the 3M™ Littmann® Cardiology IV™ 22" Stethoscope. Adjust your level of pressure on the adult or pediatric side of this one-piece diaphragm to hear the faintest high-frequency sounds. Dual head Machined stainless steel chestpiece Single-piece tunable diaphragm on adult and pediatric sides of chestpiece Adult side of the diaphragm measures 1.7" Pediatric side of the diaphragm measures 1.3" Hear low frequency sounds with light pressure and high frequency sounds with firm pressure Replace single-piece diaphragm with a non-chill rim to convert the pediatric side to open bell Latex free dual-lumen tubing Aluminum headset Soft-sealing eartips with extra pair included 22" tubing length Total weight: 5.9 oz