MDF® Sprague Rappaport Stethoscope is designed to detect the entire range of heart and chest sounds. It is five stethoscopes in one for a full range of diagnostic capability that is clinically proven to deliver more faint heart sounds and murmurs than other stethoscopes. Worldwide, it is the most popular stethoscope on the market and the choice of the medical professionals. Chestpiece: Equipped with a full rotational Dual-Output Acoustic Valve Stem, all components are individually machined and precisely assembled. Strict tolerance control and valve mechanism ensure smooth valve rotation and accurate acoustic transmission. The Chestpiece enables users to switch between adult and pediatric-sided Diaphragms/Bells with ease and interchange both side of the chestpiece with adult and pediatric Chestpiece fittings (2 Diaphragms and 3 Bells) to meet medical professionals' specific diagnostic requirements. AccuFit™ Headset: Adjustable chrome-plated wide brass tubes are outfitted with flexible spring and MDF ComfortSeal™ Eartips designed for a long lasting anatomical fit. Acoustic Tubing: Dual high performance Acoustic Tubes are secured in place by a non-pinching and non-obtrusive chrome-plated brass Acoustic Tube Clasp. Acoustic Tubes are constructed of non-cracking, non-sticking high-density latex-free PVC. Accessories: Additional (2) ComfortSeal™ Eartips, (1) ultra-sensitive Diaphragm and (1) ID tag.