Intermediate Series Full Double Horn Key: F/Bb Valves: 4 rotary valves. Bell size: M Bell type: Fixed Bore: 12mm (0.472") Valve casings: Nickel silver. Valve rotors: Solid Lever action: String Finish: Clear lacquer 667V. Though priced as an intermediate model, it is used by some professional players in top orchestras. Its easy response and sure note-centering make it ideal for students, while the colorful tone and precise intonation make it attractive to pros. The 567 is an outstanding horn and great value for its price.