3M 2450 Littmann Lightweight II S.E. Stethoscope, 28" Black Tube: Littman Stethoscope: Amazon.com: Industrial & Scientific
3M™ Littmann® CORE Digital Stethoscope, Black Chestpiece, Tube, Stem and Headset, 27 inch, 8480: Amazon.com: Industrial & Scientific
3M 2450 Littmann Lightweight II S.E. Stethoscope, 28" Black Tube: Littman Stethoscope: Amazon.com: Industrial & Scientific
Amazon.com: Compatible Replacement Tube by CardioTubes fits Littmann(r) MasterCardiologyI(r) and Littmann(r) Cardiology III(r) Stethoscopes - 7mm Binaurals BLACK TUBING : Industrial & Scientific
Amazon.com: 3M Littmann Stethoscope, Cardiology IV, Black Tube, Black Chestpiece, 27 Inch, 6163 & Classic III Monitoring Stethoscope, Black Edition Chestpiece, Black Tube, 27 Inch, 5803 : Industrial & Scientific