3M™ Littmann® Classic II Infant The two-sided chestpiece with traditional bell/diaphragm is designed and sized to provide Littmann quality acoustics for infants. The Littmann Classic II Infant Stethoscope features a 3/4-inch bell with a floating diaphragm. This stethoscope features a solid stainless steel chestpiece for high acoustic sensitivity. Application: Physical Assessment, Diagnosis Overall Performance (1-10):7 Length:28"/71 cm Weight:105 and 90 grams