Amazon.com: Replacement Tube by CardioTubes fits Littmann Classic II SE standard Stethoscopes - 5mm BLACK TUBING : Industrial & Scientific
HOW TO CHANGE LITTMAMNN STETHOSCOPE TUBE - YouTube
How to Replace Stethoscope Tubing…Is it Worth it? - Scrub Identity
Amazon.com: Replacement Tube by CardioTubes fits Littmann Master Cardiology and Cardiology III Stethoscopes - 7mm Binaurals Dark Green TUBING : Industrial & Scientific