Features: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 TubingTM 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.