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3M Littmann Cardiology IV Stethoscope, Standard-Finish Chestpiece, Black Tube, Stainless Stem/Headset, 27 inch, 6152 - Walmart.com
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Amazon.com: Compatible Replacement Tube by CardioTubes fits Littmann(r) Classic II SE(r) Standard Stethoscopes - 5mm Black on Black Tubing : Industrial & Scientific
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Amazon.com: 3M 6151 Littmann Cardiology IV Stainless Steel Chestpiece Stethoscope with 22" Black Tube : Industrial & Scientific
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