Courtois Professional Trombone

The AC420B Legend Series features a .547-inch bore designed for excellent response plus an 8.5-inch bell with superior tone. The AC420BT Series features a F Attachment with open wrap plus regular and a Thayer valve.

All WEINERMUSIC instruments are serviced by Mark Kasten,

.547" bore

8.5" bell

Open wrap F- attachment

Thayer valve

Brass outer slide

Deluxe case