3M Littmann 40006 Stethoscope Spare Parts Kit for Classic II SE GreyQuality and reliability in one convenient package Contains Small (1 2 inch) non chill bell sleeve, Grey Contains one tunable diaphragm and rim assembly for the stethoscope chestpiece, Grey Product Description 3M Littmann Stethoscopes offers the high quality that medical professionals expect, and each replacement part and accessory meets the same demanding standards. Conveniently packaged in kits that correspond to our stethoscope models, Littmann