Lightweight aluminum chestpiece construction * Non-chill diaphragm rim for patient comfort * Proprietary diaphragm enhances acoustic response by 50% over traditional designs * Adjustable chrome-plated brass binaurals with PVC eartips * Flexible 22  PVC tubing * Spare pair of black mushroom eartips included * Inspected and packaged in the U.S.A * One year warranty * Combination diaphragm/bell chestpiece for wide frequency response * Diaphragm diameter 13/4   bell diameter 3/4  * Non-chill bell ring and diaphragm for patient comfort * Weighs 3.5 oz * Overall length 32.5  *