3M Littmann CORE Digital Stethoscope – USA Medical Supply
3M™ Littmann® Stethoscope Binaurals for Master Cardiology™ , Cardiology III™ , Cardiology II S.E. and Cardiology S.T.C. Stethoscopes, Black Tube, Black Eartips, 27 inch - SAVELIVES
Amazon.com: Compatible Replacement Tube by CardioTubes fits Littmann(r) Classic II SE(r) standard Stethoscopes - 5mm BURGUNDY TUBING : Industrial & Scientific