Similar rim to 5G and 1mm bigger cup than 6 1/2
Big sound. Ideal for first trombone in orchestra and band. The most used mouthpiece in the symphonic trombone. Very powerful and a lot of projection in the sound.
Inner rim diameter: 25,25mm
Outer rim diameter: 39mm
Cup depth 30mm / Throat 7mm
Backbore Medium Symphony
Rim options: F semi flat - S rounded