Threaded chestpiece drum of chrome plated zinc permits the use of five interchangeable chestpiece fittings. 22″ tubing length; overall length 30″ (except #640 has 16″ tubing length with overall length 24″). Latex free, double tube configuration for improved acoustic separation. Proprietary valve mechanism eliminates acoustic leakage. Adjustable chrome plated brass binaurals. Complete with an accessory pouch containing the bell chestpieces, chestpiece key, 2 spare diaphragms, one pair of mushroom eartips and one pair of silicon eartips. Weighs 7 oz. Inspected and packaged in the U.S.A. Five year warranty (except #640 has one year warranty). Latex free.