Adscope® 647 Sprague-one Stethoscope. ADC's legendary Sprague with a lightweight single tube design for greater comfort and convenience. Threaded chestpiece drum permits the use of 5 interchangeable chestpiece fittings-adult and pediatric diaphragms, and 3 bells; (1 1/4", 1", 3/4")- for complete diagnostic capability in most patients. Complete with an accessory pouch for the bell chestpieces, chestpiece key, 2 spare diaphragms, 1 pr. of mushroom eartips, and 1 pr. of silicon eartips, Wt. 7 oz., length 31 1/2. 5 yr. warranty.