Colour: navy blueLenght: 69 cmHead Diameter is 43/33 mmThe 3M? Littmann Classic III Stethoscope offers high acoustic sensitivity for exceptional performance when doing general physical assessments. It features dual tunable diaphragms and updated design.High acoustic sensitivityDual single-piece tunable diaphragms (pressure sensitive)Small-side diaphragm prevents debris in open bellSnap tight soft-sealing eartipsNext generation longer-life tubingSmall side converts to open bell