Anodized aluminum chest piece, plastic ear tips, 22" tubing.
12-2200: Nurses' Stethoscope
Turn stem to convert to non-child Ford Bell. External spring binaural, 22" tubing.
12-2210: Dual-head
12-2211: Dual-head Littman-type
Rotating drum stem and external spring binaural. Comes with 3 bell chestpieces and 2 diaphragms. 22" tubing.
12-2220: Sprague-Rappoport