Deep cup, moderately rounded. Rich Euphonium tonal character with clear response in all registers.
Specs
Cup Diameter (mm):Â 25
Throat Bore (mm): 7.15
Rim (mm): 7 (Slightly rounded inner edge)
Long throat with flat tapered backbore.
Note on shanks
No indication: Large shank, for modern instruments with large receivers: (ø = 15.2 mm)
"S" models:  For intruments with small receivers: (ø = 14.8 mm)
Standard large European shank is recommended for most mouthpieces.
The Perantucci S shank is recommended for instruments that have smaller receivers or those which have high resistance
