3M Littmann Cardiology S.T.C. (Soft-Touch Chestpiece) Stethoscope Black Tube 27 inch 4471
http://www.amazon.com/gp/product/B000F4W1PS?tag=sukses2015-20

3M Littmann Cardiology S.T.C. (Soft-Touch Chestpiece) Stethoscope Black Tube 27 inch 4471
Precision balanced ergonomically designed chestpiece moves easily between various auscultation sites and delivers high acoustic performance
Soft-Touch insert provides comfortable secure grip in at least three hand positions with and without gloves
Tunable diaphragm responds with a simple pressure change to capture low and high-frequency sounds
Two-in-one tube design dual lumen eliminates noise interference from two external tubes rubbing together
Anatomically correct and angled headset channels sound into the ear canal