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Amazon.com: 3M Littmann Cardiology IV Diagnostic Stethoscope, Rainbow-Finish Chest Piece, Black Tube, Stem and Headset, 27 Inch & Classic III Monitoring Stethoscope, Rainbow-Finish, Caribbean Blue Tube, 27 Inch : 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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