3M Littmann Classic III StethoscopeStandard Edition; Black Tube, Stainless Stem and Headset, Standard Finish Chestpiece Product Code : 3M5620 The Classic III stethoscope brings new design, materials, and technology to the Littmann stethoscope series that's been used and trusted by medical professionals for decades. With a two sided chestpiece, dual tunable diaphrams, improved tubing, and much more, the Classic III stethoscope combines the best of new and traditional. Two sided