3M Littmann Stethoscope Spare Parts Kit for the Master Classic™ Stethoscope in black includes a tunable diaphragm for chestpiece, black rim, and two small Snap Tight Soft-Sealing Eartips. Tunable diaphragm technology allows for easy frequency adjustment by adjusting chestpiece pressure. Snap-tight eartips provide excellent acoustic seal and comfortable fit.

Snap Tight Soft-Sealing Eartips – Small, Tunable Rim /Diaphragm Assembly