Stethoscope littmann feature high acoustic sensitivity and durable, compact design Two-sided traditional combination chestpiece 
3M Littmann Classic II SE stethoscope is recommended for Medical Students, Nurses and General Practitioners. Known as the 'industry standard' stethoscope, it offers high acoustic sensitivity. Typical applications include physical assessment and diagnosis. 
Excellent acoustic seal and comfortable fit with patented Snap Tight Soft-Sealing Ear tips non-chill rims for patient comfort 
Comfortably angled, anatomically correct headset, patented tuneable diaphragm which enables you to listen to high and low frequency sounds by simply alternating pressure, high performance and extremely long-lasting single-lumen tubing 
Stainless steel chest pieces 

Benefits 
Two-sided traditional combination chestpiece 
Tunable diaphragm on one side, traditional bell on the other 
Anatomically designed headset