The high perfomance and outstanding acoustics of the Clinical I? now in a teaching stethoscope. Featuring a stainless steel chestpiece and stainless steel binaurals, the Clinical I? Teaching stethocope incorporates the most effective sound conducting metal available. The Extra Thick Walled Tubing? with an inside alloy sound conductor assures the clear crisp transmission of sound. The Clinical I? Teaching stethocope includes two sizes of eartips which seal out extraneous noise while providing superior comfort. An easy to use snap-on rim and diaphragm help make the Clinical I? Teaching stethocope an outstanding performer. Extra diaphragm included. Lifetime Limited Warranty.