Miraphone CC-291 B C-Tuba, 5 valves, bell diameter: 470 mm, 5/4 size, rotary valves, bore size: 20,4mm- 21,2 mm, nickel silver trimmings, Miraphone minibal ball joints, brass body, gold brass leadpipe, clear lacquered, incl. mouthpiece: TU31, without case