Cup Diameter: 32.00 mm, Shallow, bowl-shaped
Rim: 8.00 mm, Slightly rounded
Bore: 7.80 mm
Resistance: Moderate
Shank: Large

The RT-64 is likely the most widely used and successful modern F-tuba mouthpiece.

It has benefited from constant refinement and adaptation to the requirements of modern artists and their repertoire. It makes a lively and exciting sound with clear core possible. True Sound Energy, character and clarity for virtuoso solo and orchestral performance. Also recommended as a solo mouthpiece for Eb tubas.