The superbone is just the instrument to enable playing those super fast passages using the piston valves, while having the slide for glissandos.

Specifications

• Pitch: Bb
• Dual bore: 0.5" (12.7mm) to 0.525" (13.33mm)
• Bell: 8.46" (215mm)

Special Features

1. Cupronickel slides
2. Cupronickel with nickel plated piston valves
3. Lightweight foambody case
4. 6 - 3/4 C mouthpiece

For more information about the ‘superbone’ design see Wikipedia entry.