The Robert Tucci RT-7C is truly a large euphonium mouthpiece which allows great volume and depth of tone. The RT-7C is ideal for strong players who often perform in large ensembles.
Cup Diameter: 26mm/1.02in, large, wide, and deep configuration
Rim Width: 6.75mm/0.27in, well defined inner edge
Throat/Bore: 7.5mm/0.3in, open backbore