The Pro Advantage Sprague Stethoscope features a double-tube configuration for improved stereo separation as well as a patented chestpiece valve stem which delivers outstanding acoustics. An accessory kit contains five interchangeable chestpiece fittings – an adult and pediatric diaphragm, and three bells (1 1/4″, 1″, 3/4″), deluxe eartips, and a chestpiece key. 22″ tubing length. Five year warranty. Latex free.