This is a Shakuhachi 尺八 flute made of a Single Stalk of Bamboo. The interior is coated in lacquer and tonoko (jiari type) to protect it from breath moisture and optimize the resonance. The ox horn reed is in good contain. This is a playable instrument.

It is 19" long by about 1.5" in diameter.  This is a two-piece flute that pulls apart for easy storage. New and other vintage shakuhachi start at around $800 and can easily go over $2000. 

Please see the pictures for details.

The shakuhachi is a traditional Japanese bamboo flute known for its distinctive sound and rich history. Originally used by Zen Buddhist monks for meditation and spiritual practice, it is characterized by its deep, breathy tones and ability to produce a wide range of pitches and timbres. The shakuhachi is typically made from the root end of a bamboo culm, and its five finger holes (four in front and one in back) allow for a variety of expressive musical techniques, including vibrato, glissando, and microtonal changes. It is widely recognized not only for its role in Japanese classical music but also for its influence on contemporary music across various genres.