A patented tunable diaphragm and superb craftsmanship offer the ultimate performance in a superior-single sided stethoscope meets the exacting standards of health care professionals who demand the highest acoustic response. Features patented Littmann Snap Tight soft-sealing eartips, patient-friendly, nonchill rim and diaphragm and special procedures adapter. Seven-year warranty, plus lifetime service and repair policy.- Stethoscope, 27" Plum Tubing (Littmann items are only available for sale online by distributors authorized by 3M Littmann)