Black 28 * Traditional bell combined with a tunable diaphragm that conveniently alternates between low and high frequency sounds without the need to turn over the chestpiece * Excellent acoustic seal and comfortable fit with patented Littmann Snap Tight soft-sealing eartips * Comfortably angled anatomically correct headset * Patient-friendly nonchill rim and diaphragm * Single lumen tubing in a range of colors * 3 year warranty *Marble Medical