Our standard for brass quintet publishing is to include:
Score
Trumpet in Bb 1
Trumpet in Bb 2
Horn in F
Trombone (bass clef)
Tuba (bass clef)
Many of our more popular brass quintets also include "world parts". This adds:
Horn in Eb
Trombone in Bb treble clef
Tuba in Bb treble clef
Tuba in Eb treble clef