Pearl Blue  28  * One inch traditional pediatric bell combined with a floating diaphragm * Sold stainless steel 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 attractive colors * 3 year warranty