King 2341 TubaThe 2341King Tuba model 2341UB, 4 front action piston valves, .687" (17.45mm) bore, fixed 19" (483mm) upright bell, hand-adjustable 1st valve slide, lacquer finish, 18 mouthpiece. A full-sized, 4/4 tuba with a centered, rich tone. Front action valves and an easy to reach 1st valve slide allow for fine tuning during performance.King Musical InstrumentsSome of the biggest names in the music business have traveled with a King by their side. King instruments are known for their response and excellent intonation, as well as innovation that always tests the limits of an instrument. That"s what made King famous.