Shires 12C
TrumpetIn Production
Precision Specifications
RIM DIAMETER15.2 mm
CUP DEPTHMedium
THROAT ∅3.65 mm
BACKBORE—
SHANKstandard
CUP SHAPE—
Rim Width—
Rim Contour—
Throat Drill #27
Material—
Finish—
Weight—
Recommended For
OrchestralAll Around
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Reference Notes
S.E. Shires trumpet mouthpiece, model 12C. Precision-machined to Shires' published measurement specifications. 15.20mm rim diameter with medium cup depth and 3.65mm throat. Verified against seshires.com measurement tables. Use these measurements as a comparison starting point: fit and response still depend on the player, dental structure, instrument receiver, and each manufacturer's measuring method.