Cerveny CBB 693-4PRX Bb-Tuba, 4 rotor valves, very compact, MINIBAL- joints, yellow brass - bosy, yellow brass - bell, nickel- silver mouthpipe, nickel- silver inner- and outerslides, nickel silver bell rim, bore: 21,2mm, bell: Ø500mm, length: 95cm, weight: 10,2kg, incl. silver plated mouthpiece and case.