Amazon.com: 3M Littmann Classic III Monitoring Stethoscope, Black Tube, 27 inch, 5620 : Industrial & Scientific
3M Littmann Lightweight II S.E. Stethoscopes, Caribbean Blue Tube, 28 inch - Walmart.com
Amazon.com: 3M Littmann Classic III Stethoscope, Black Edition Chestpiece, Black Tube, 27 inch, 5803 and Primacare DL-9325 Reusable LED Penlight with Pupil Gauge bundle : Industrial & Scientific
Littmann Stethoscopes | 3M United States
3M Littmann Lightweight II S.E. Stethoscope: Black 2450