Contrabass Tuba, brief description
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“Classification
Aerophone, lip-vibrated instrument, brass wind instrument. Belongs to the valved bugle-horns family.
Material
Brass, gold brass, nickel silver, gold lacquer.
Mouthpiece
Large cup mouthpiece
Tubing
Length 540 cm, conical along entire length
Bore
Very wide, inner diameter 19–21 mm
Valves
Five valves (lowering pitch by 1, ½, 1½ steps, fourth, fifth). On instruments with six valves: 5th valve wide whole step; 6th valve wide half step.
Bell
Rim diameter 38–48 cm”