3M™ Littmann® Stethoscope Spare Parts Kit, Classic III™ and Cardiology IV™ Grey • Quality and reliability in one convenient package • Contains one tunable single piece diaphragm for the adult side of the stethoscope chestpiece, Grey • Contains one tunable single piece diaphragm for the pediatric side of the stethoscope chestpiece, Grey • Contains one non-chill bell sleeve, Grey