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3M Littmann Stethoscope, Master Cardiology, Black Tube, Smoke Chestpiece, 27 inch, 2176: Amazon.com: Industrial & Scientific
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3M Littmann Stethoscope, Cardiology IV, Black Tube, Black Chestpiece, 27 Inch, 6163: Amazon.com: Industrial & Scientific
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3M Littmann Stethoscope, Cardiology IV, Black Tube, Black Chestpiece, 27 Inch, 6163: Amazon.com: Industrial & Scientific
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