3M Littmann Classic III S.E. Stethoscope Ceil Blue 5630 provides high acoustic sensitivity combined with exceptional versatility. Its innovative design offers a tunable, single-piece diaphragm on each side of the chest piece the large side can be used for adult patients, while the small side is especially useful for pediatric assessment. Plus, the pediatric side of the chest piece can be converted to a traditional bell replacing tunable diaphragm with non-chill bell sleeve.