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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 Dark Burgundy TUBING : Industrial & Scientific
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3M Littmann Cardiology IV Stethoscope, Standard-Finish Chestpiece, Hunter Green Tube, Stainless Stem/Headset, 27 inch, 6155 - Walmart.com
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3M™ Littmann® Master Cardiology™ Stethoscope, 2160, Standard-Finish Chestpiece, Black tube, 27 in, 3 Each/Case | 3M United States
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3M Littmann Stethoscope Spare Parts Kit, Classic III, Black, 40016 : Industrial & Scientific - Amazon.com
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3M Littmann Core Digital Stethoscope 27" Black Tube / High-Polish Rainbow Chestpiece / Black Stem / Black Headset 8570 - Walmart.com
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