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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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Package Insert for 3M Littmann Master Classic II Stethoscope - 3M Littmann Stethoscopes - PDF Catalogs | Technical Documentation
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3M Littmann Master Classic II Stethoscope, Black Plated Chestpiece and Eartubes, Black Tube, 27 inch, 2141 - Walmart.com
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Amazon.com: 3M Littmann Classic III Monitoring Stethoscope, Black Edition Chestpiece, Black Tube, 27 inch, 5803 : Industrial & Scientific
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