3M LITTMANN MASTER CARDIOLOGY BLACK.24, 2160 Get improved acoustics and updated design features from the 3M Littmann Cardiology IV 27" Diagnostic Stethoscope. Adjust your level of pressure on the adult or pediatric side of this one-piece diaphragm to hear the faintest high-frequency sounds.Machined stainless steel chestpieceSingle-piece tunable diaphragm on adult and pediatric sides of chestpieceAdult 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 pressureDiagnose and make decisions with confidenceHear subtle changes in patient statusReplace single-piece diaphragm with a non-chill rim to convert the pediatric side to open bellLATEX-FREE dual-lumen tubingAluminum headsetSoft-sealing eartips with extra pair includedTotal stethoscope length: 27"Total weight: 5.9 ozGreat in critical care and challenging environments like ED, ICU, Cardiac and step-down units