Spare Parts Kit compatible with 3M LittmannCardiology III. stethoscope.Quality and reliability in one convenient package The package contains: Two Snap Tight Soft-Sealing Eartips – Small (1/2 inch) Tunable Diaphragm/Rim Assembly – Adult Rim snap-on – Pediatric Tunable Diaphragm – Pediatric Littmann code: 40003 (black), 40004 (grey)