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Amazon.com: 3M 2176 Littmann Master Cardiology Smoke Chestpiece Stethoscope with 27" Black Tube : Industrial & Scientific
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Amazon.com: 3M Littmann Cardiology IV Diagnostic Stethoscope, Black-Finish Chestpiece, Black Tube, Stem and Headset, 27 inch, 6163 + 40007 Stethoscope Identification Tag, Black : Industrial & Scientific
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