ADC Adscope 641 Sprague Stethoscope with 5 Interchangeable Chestpiece Options, 30 inch Length, Frosted Seafoam 5 chestpiece fittings for use on virtually any patient Patented valve mechanism eliminates acoustic leakage Gasketed fittings for improved security Chestpiece key facilitates diaphragm replacement Inspected and packaged in the usa