Yamaha YOB-431 Oboe, Oboe@+YAMAHA's mid-range oboes are based on the top models in the custom series and are made with the same meticulous care. Specialists monitor every step of the production. These oboes provide an accurate intonation, a balanced response and an exquisite sound. The YOB-421 is equipped with a semi-automatic conservative flap system, and the body is made from carefully seasoned grenadilla wood of the highest quality., Semi-automatic, Conservatorium system, Closed flaps, 3rd Octave flap, F-flap on the left, Fork-F resonance key, Trill keys: C#-D#, F#-G#, Ab-Bb, A#-B, B-C#, left C-D, right C-D, Grenadilla body (Dalbergia melanoxylon), Silvered nickel silver flaps, Includes case