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Dual Function Head and Air-Tight Machining!  A special value as only a few remain from the original "PRECISION MADE IN JAPAN" Instruments. 

When you want top quality  workmanship and definitive sensitivity for critical  diagnosis, this is the stethoscope.  The Definer's stainless steel chestpiece is machined airtight!  Test other stethoscopes and you will find leaky machining. See the  AIRTIGHT MACHINING test._*  

Adult size diaphragm and bell. The head is made of stainless steel. The  binaurals are high-density chromed-brass. Silver gray tubing. When you use the Definer^TM  you'll know you're using the best. Includes two pair of eartips (white plastic, soft rubber mushroom) for your individual comfort. 

*The AIRTIGHT MACHINING TEST: turn the chestpiece so that you enable the bell (hole is under bell opening). Connect the stethoscope to your ears. Put one finger over the chestpiece bell hole to seal it. Lightly press on the diaphragm. Do you feel pressure in your ears when you press on the diaphragm? If so, the stethoscope is leaky.  ONLY the most costly stethoscopes include this feature, which is crucial to sensitivity and professional quality.