4 Valve Model The AC156 Professionel Series features a 413-inch bore with a four valve design with a direct air column through the valveblock for less resistance. The AC156 Series also features a 6.6-inch Rose brass bell designed for a dark sound with outstanding response and a 1st valve slide trigger for easy intonation adjustment.
- Key of Bb
- .413″ bore
- 6.6″ Rose brass bell
- Monel valves Vertical valve slides with 1st valve slide trigger Direct air column design through valveblock
- Includes case and mouthpiece