Adscope Sprague Stethoscope with Accessory Pack, Black, Retail Packaging. Threaded chestpiece drum of chrome plated zinc permits the use of five interchangeable chestpiece fittings – an adult and pediatric diaphragm, and three bells (1 1/4″, 1″, 3/4″). Adjustable aluminum binaurals. 22″ tubing length; 30″ overall length. Complete with an accessory pouch containing the bell chestpieces, chestpiece key, 2 spare diaphragms, one pair of hard eartips and one pair of soft clear eartips.