Check the listing for details. ADC 641BK Sprague Rappaport ADSCOPE 22" Stethoscope Black. Condition: New. Listed at 22.99 USD. ADC 641BK Sprague Rappaport ADSCOPE 22" Stethoscope Black The ADC 641 Sprague has an exclusive design that features an improved valve mechanism that virtually eliminates acoustic leakage and a chestpiece key to facilitate after market service.The ADC 641 Sprague features: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") - for complete diagnostic capability on most patientsLatex-free, double tube configurationProprietary valve mechanism eliminates acoustic leakageAdjustable chrome-plated brass binauralsConvenient 22" tubing lengthComplete with an accessory pouch containing the bell chestpieces, chestpiece key, 2 spare diaphragms, one pair of mushroom eartips, and one pair of silicon eartipsWeighs 8 oz.Overall length 30"5 Year WarrantyInspected and packaged in the U.S.A.