With a double flute you play the melody on one side and the other side provides the drone in the root note of the flute - it sounds like two people are playing. Our Nova double flutes are handcrafted from domestic Spanish Cedar, which gives them a warm, full musical voice. The dimensions for this flute are: 16-inches long (40.6 cm) by 2.25-inches wide (5.7 cm) by 1.25 deep (3.2 cm)Our Double Flutes have two mouthpieces so you can play it as a double flute or a single flute instantly. The flute is tuned in the key of 'G' minor and can also be played in the relative major diatonic scale in the key of 'A♯'. This flute is a good accompaniment to any of our other Traditional Flutes (440 Hz) tuned in the key of 'G' minor.