All Trombone quartets come with

• Part 1 - Bass, Tenor, and Bb Treble clef
• Part 2 - Bass, Tenor, and Bb Treble clef
• Part 3 - Bass, Tenor, and Bb Treble clef
• Part 4 - Bass, Eb Treble and Bb Treble clef
• Percussion - optional

Free transposition of individual quartets to different keys is available on request.