Amazon.com: Replacement Tube by CardioTubes fits Littmann Master Cardiology and Cardiology III Stethoscopes - 7mm Binaurals Dark Green TUBING : Industrial & Scientific
Littmann Cardiology III Post-Use Review - YouTube
Amazon.com: Replacement Tube by CardioTubes fits Littmann Master Cardiology and Cardiology III Stethoscopes - 7mm Binaurals Dark Green TUBING : Industrial & Scientific