YAMAHA flute head joint (with case) Purchased in mid-December of last year at the Yamaha Ginza store. It's a beautiful item with a total playing time of about 2 hours. The diameter of the tube at the joint is approximately 19.9mm. It has been adjusted to fit Muramatsu flutes. Please note that this is an amateur measurement. When fitting it to your own flute, please consider having it adjusted by a specialist. This is the head joint that comes with the top-of-the-line handmade model "Ideal" in the Yamaha flute lineup. It is light and easy to play, with a clear tone and is easy to play across the entire range. Purchase price: 170,500 yen It's a head joint from the latest model with almost no signs of use. How about taking this opportunity?