Musicians frequently use tubas in the band. They are sometimes used in orchestras. The tuba has the largest cupped mouthpiece of all the brass instruments. This instrument also contains a bell, coiled tubing, slide pull ring, and piston valves. A form of the first tuba was called a Roman buccina. Improvements were made to the instrument over the years. Phasey altered the instrument in 1870’s by widening the bore, producing the instrument we now know of today as the tuba. Tubas produce the lowest tone in the brass instruments. The helicon and sousaphone are variations of the tuba and include bell joints of different shapes.