3m Littman 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, Littman stethoscope replacement parts and accessories make repairs simple. each item is carefully manufactured to work seamlessly with existing equipment. 3M Littman stethoscope Spare parts Kit for all Littman stethoscope contains two small (1/2 inch), black snap tight soft-sealing ear tips. Snap-tight, soft-sealing ear tips conform to individual Ears for an excellent acoustic seal and comfortable fit. Ear tips snap firmly onto the ends of the ear tubes and, for Safety, require a significant effort to remove.