The 3M™ Littmann™ Classic II infant stethoscope has a 3/4-inch bell for an easier chestwall seal. The Classic II Infant stethoscopes, are designed for long-lasting durability. This precision instrument is designed to maximize the comfort of both patient and professional.BenefitsThe solid stainless steel chestpieces on the 3M™ Littmann™ Classic II Infant Stethoscopes are optimally sized for your little patients. The small diaphragm conforms to the contours of infant bodies.