- Inner Diameter: .670 measured .04 inches into the cup.
- Outer Diameter: 1.124
- Cup Depth: This mouthpiece has an MD (Medium Deep) cup, which is similar to a Bach 1 1/2 C or 5C, Warburton MD, regular Schilke, Yamaha C, or GR MX cup. This cup produces a large, dark orchestral sound.
Backbore: This top is best used on an ML (Medium-Large) backbore which can be purchased here.