Snap-on Rim for Littmann® Cardiology II, Classic II, Select & Lightweight II S.E. Stethoscopes, Black. Allows for easy, snap-on replacement of diaphragm rim. Chestpiece rim assemblies are available in sizes to fit all Littmann stethoscope models, and in black and gray colors to match tubing and eartips. Look at the chestpiece to see if the name of your stethoscope is indicated.