Demo Antoine Courtois Trombone AC420BO-1-0 Legend Bb/F Tenor Trombone Bore: .547 Leadpipe: Standard fixed Leadpipe Material: Yellow brass Bell: 8.5-inch one piece Bell Material: Yellow brass Handslide: Standard weight Handslide Material: Yellow brass Handslide Crook Material: Yellow brass F-Attachment Wrap: Open F-Attachment Valve: Standard rotor Features: One piece bell; Miniball linkage and adjustable thumb trigger Case: Lightweight contoured Mouthpiece: Yes Mouthpiece Shank: Large Finish: Lacquer The Antoine Courtois AC420BO Legend Series F-Attachment Trombone offers amazing performance and sound for the player looking for a symphonic trombone. The AC420BO Legend features a .547″ bore combined with an 8.5″ one piece bell that provides excellent projection and response. The open wrap F-Attachment features a free-blowing design plus an adjustable thumb trigger for player comfort and mini ball linkage for smooth action. The Courtois AC420BO Legend F-Attachment trombone includes a lightweight contoured case and mouthpiece and is available in lacquer finish with a yellow brass bell.