Bbb Tuba /Arion 4/ With 4 Rotary Valves, 3/4 Size, Compact Model, Yellow Brass Finish, Bore 20.2Mm (.795""), Bell 400Mm (15.75""), Nickel-Silver Mouthpipe, Valve Casings And All Trimmings, Tuning Slide Waterkey, Minibal Action, Lacquer