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Need Help? Ask our Experts or call 800-449-9128
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.