Combination adult lightweight aluminum chestpiece has extra large 1 3/8 inch diameter bell and highly sensitive 1 3/4 inch diaphragm. Non-chill bell and diaphragm retaining rim for patient comfort. Features internal spring binaurals and custom molded 22 inch PVC tubing. Includes Adsoft PVC eartips (large size) and spare diaphragm. Weighs just 4.5 oz., overall length 31 inches. Five year warranty.