Due to State and Federal Law, we sell Syringes and Needles only to the Medical Facilities. One-inch traditional bell (pediatric) and 3/4 inch bell (infant) combined with a patented floating diaphragm * Stainless steel chestpiece * Excellent acoustic seal and comfortable fit with patented 3M? Littmann Snap Tight soft-sealing eartips * Comfortably angled, anatomically correct headset * Single-lumen tubing is available in attractive colors * Three-year warranty