3M Littmann Master Classic II Stethoscope 2147 Navy Blue Tube, 27 inch.

The excellent acoustic sensitivity of a tunable diaphragm is the hallmark of this superior single-sided stethoscope. Award-winning design combines high performance with portable convenience.

The Littmann Master Classic II stethoscope features a tunable diaphragm, which allows the user to conveniently alternate between low- and high-frequency sounds without turning over the chestpiece.