Bb B Sousaphone from the Symphony series. C.G. Conn Instruments standing for high quality american made brass instruments. The history shows the long periode of making experiences and getting better. But the main effort based on passion and love for music. Play and you will hear it. Features 3 valves, Bore .734'' = 18,64 mm, Bell Ø 26'' = 660 mm, All brass, CONN 18 mouthpiece, Hard-shell case with wheels, Lacquered finish, Weight approx. 12,7 kg.