The 1240 XO Series features a large .571-inch bore combined with an independent dual Thayer valve system in Bb / F / Gb / D. The dual Thayer valve system creates an air passage that is completely balanced in both open and operated functions to ensure no loss of tone color or clarity.
  • Key: Bb / F / Gb / D
  • Bore: .571"
  • Leadpipe: Interchangeable
  • Leadpipe Material: Yellow Brass
  • Bell: 9.5" Two Piece
  • Bell Material: Yellow or Rose Brass
  • Handslide: Standard
  • Handslide Material: Yellow Brass
  • Handslide Crook Material: Nickel Silver
  • F Attachment Wrap: Open
  • F Attachment Valve: Dual Thayer
  • Features: Three Interchangeable Leadpipes; Dual Thayer Valve Independent System
  • Case: XO Series Wood Shell
  • Mouthpiece: Yes
  • Finish: Lacquer