Tuba
E flat bass
B flat bass

In the brass band, the tubas also read in treble clef, and in a similar range to trumpet sheet music, however they sound two octaves lower. There are two different pitched tubas in the brass band: the E flat bass and the B flat bass. The easiest sheet music options is to give the E flat bass the Baritone Saxophone music (although it may need to be taken down the octave in places) and the B flat bass the Bass Clarinet music. 

Another option for the E flat bass is to change the tuba part, in the same way that is described for the tenor horn: change the clef to treble clef, and then add three sharps to the key signature. For example, if there are three flats, then adding three sharps cancels them out. Then the part can be played as though it is treble clef. For example, the C on the second line when it was bass clef, is now read as an A in treble clef. The accidentals should be altered with the same intent (raise or lower by a semitone).