For trumpets in Bb or C. Optional 3rd parts for trumpet, horn or trombone provided. Trombone parts in bass clef, but also provided in Bb treble clef for baritone/euphonium players. Possible configurations include 211.01 (standard); 301.01; and 202.01 quintets, and more if you swap baritone/euphonium(s) for trombone(s).