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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 Classic III Monitoring Stethoscope, Black Tube, 27 inch, 5620 : Industrial & Scientific
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6190 3M Littmann Cardiology IV Diagnostic Stethoscope, Caribbean Blue and Champagne(27″) – Student Medical Shop
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