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3M™ Littmann® Cardiology IV™ Diagnostic Stethoscope, High Polish Smoke-Finish Chestpiece, Black Tube, Black Stem and Black Headset, 27 inch, 6232: Amazon.com: Industrial & Scientific
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Amazon.com: Compatible Replacement Tube by CardioTubes fits Littmann(r) MasterCardiologyI(r) and Littmann(r) Cardiology III(r) Stethoscopes - 7mm Binaurals BLACK TUBING : Industrial & Scientific
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ADC Adscope Lite Model 619 Ultra Lightweight Clinician Stethoscope with Tunable AFD Technology, Burgundy: Amazon.com: Industrial & Scientific
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Amazon.com: Compatible Replacement Tube by CardioTubes fits Littmann(r) Classic II SE(r) Standard Stethoscopes - 5mm Pink TUBING : Industrial & Scientific
3M 2450 Littmann Lightweight II S.E. Stethoscope, 28" Black Tube: Littman Stethoscope: Amazon.com: Industrial & Scientific