MDF® Sprague Rappaport Dual Head Stethoscope with Adult, Pediatric, and Infant Convertible Chestpiece The MDF® Sprague Rappaport Stethoscope is five stethoscopes in one for a full range of diagnostic applications and is traditionally trusted to detect faint heart sounds and murmurs. As the most versatile model on the market, this classic design allows healthcare professionals to assess adult, pediatric, and infant patients using just one stethoscope. An ergonomic design ensures comfort for the doctor and patient, even during extended use. The handcrafted gold-plated zinc-alloy dual-head convertible chestpiece is precisely machined for high performance and durability. Full-rotation dual-output acoustic valve stem with green indicator dot allows the user to easily identify the active sound channel. Using the included accessory kit, the adult and pediatric diaphragm assemblies can be removed and replaced with adult, pediatric, and infant bells.