The 3M™ Littmann™ Lightweight Stethoscope is an affordable stethoscope for health care providers. A solid aluminum chestpiece assures acoustic sensitivity and consistent high-frequency response. A large open bell provides sensitivity to low-frequency sounds Benefits: Lightweight and easy to carry. Aluminum combination chestpiece produces reliable acoustic performance. The eartubes are set at the proper anatomical angle so they don't need readjusting. The patented 3M™ Littmann™ Snap-tight Soft-sealing Eartips remain secure, yet may be easily removed for cleaning or replacement. Two-year manufacturer's warranty. Length: 28 in. (71.1 cm) Chestpiece: Aluminum, 25 grams, 1.75 in. diameter