Special design and sized dual-sided chestpiece helps assess and diagnose infant patients. Dual-sided chestpiece and floating diaphragm provides high acoustic sensitivity for listening to low (bell) and high frequency sounds. Nonchill rim and diaphragm offers welcome patient comfort. Durable, latex-free design, variety of tube colors and chestpiece finishes and the length of tube is 28 inch. 3 year manufacturer’s warranty from the date of purchase. 3.3cm diaphragm.