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.