Littmann Classic III Monitoring Stethoscope, Smoke, Black Tube - Walmart.com
Amazon.com: Compatible Replacement Tube by CardioTubes fits Littmann(r) Classic II SE(r) Standard Stethoscopes - 5mm Black on Black Tubing : Industrial & Scientific
3M 1 EA Littmann Classic III Stethoscope, 27", Plum, Standard 5831 707387772093 | eBay
3M™ Littmann® Master Cardiology™ Stethoscope | 3M United States
Littmann Stethoscopes | 3M United States
Amazon.com: Compatible Replacement Tube by CardioTubes fits Littmann(r) Classic II SE(r) standard Stethoscopes - 5mm SKY BLUE TUBING : Industrial & Scientific