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STETHOSCOPE TUBING by Reliance Medical FITS LITTMANN® CARDIOLOGY IV® 11 COLORS | eBay
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Amazon.com: Replacement Tube by CardioTubes fits Littmann Master Cardiology and Cardiology III Stethoscopes - 7mm Binaurals Dark Green TUBING : Industrial & Scientific
3M™ Littmann® Stethoscope Binaurals for Master Cardiology™, Cardiology III™, Cardiology II S.E. and Cardiology S.T.C. Stethoscopes, Navy Blue Tube, Grey Eartips, 27 inch - SAVELIVES
Littmann Cardiology IV Diagnostic Stethoscope: Champagne & Caribbean B