Tuba Bb/F Key,Lacquer Yellow brass,Cupronickel valves,cupronickel side,cupronickel tenon Sousaphone Bb key,cupronickel valve TubaBb/F Key,LacquerYellow brass,Cupronickel valves,cupronickel side,cupronickel tenonSousaphoneBb key,cupronickel valve TubaKey:Bb/F keyMaterial:Cupronickel valves,cupronickel side,cupronickel tenonSize: Bore size 18mm,bell dia:400mmFinish:gold lacquer SousaphoneKey: Bb ...