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3M Littmann Stethoscope, Master Cardiology, Black Tube, Stainless Steel Chestpiece, 27 inch, 2160: Amazon.com: Industrial & Scientific
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Amazon.com: 3M Littmann Stethoscope, Cardiology IV, Black Tube, Stainless Steel Chestpiece, 22 inch, 6151 : Industrial & Scientific
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