Handcrafted Since 1971 | Lifetime Warranty | Free-Parts-for-Life Program | Latex Free 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. This versatile 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. Chestpiece: The handcrafted 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. Acoustic Tubing: Constructed of thicker denser latex-free extruded PVC the dual non-stick acoustic tubing provides insulation for superior sound transmission and seals out ambient noise while preventing the cracking and wearing that can occur from repeated use. Dual high-performance acoustic tubes are secured in place by a non-pinching non-obtrusive chrome-plated brass acoustic tube clasp. AccuFit Headset:Adjustable headset constructed from chrome-plated brass allows the user to create an individualized fit. Soft silicone ComfortSeal? eartips (available in standard and small sizes) are clear for hygienic purposes and conform to the ear to seal out extraneous noise while ensuring comfort during extended use. Patented SafetyLock? eartip adaptors lead the industry in user safety. Included Accessories: 2 extra sets ComfortSeal? eartips spare adult and pediatric clear PVC diaphragms pediatric diaphragm assembly pediatric bell infant bell and ID tag.