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3M Littmann Classic III Monitoring Stethoscope, Black Tube, 27 inch, 5620: Amazon.com: Industrial & Scientific
3M™ Littmann® CORE Digital Stethoscope • 27"L, Black Chestpiece, Tube and Stem | Hopkins Medical Products
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3M Littmann Classic III Monitoring Stethoscope, Black Tube, 27 inch, 5620: Amazon.com: Industrial & Scientific
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