This is a G-key kena made of madake bamboo (slightly thick). It is tuned to approximately A=442Hz. ・Size: Total length 36.5cm, mouthpiece inner diameter 21-21.5mm, wall thickness 3.8mm, largest finger hole diameter 11mm, mouthpiece width 10mm, mouthpiece depth 7mm ・Surface finish: Coating with self-extracted oil during oil removal & partial application of camellia oil ・Weight: 91g ・Note: There is a light brown natural pattern along the length of the material on the back (images 5-6) In this area, madake bamboo is also called "otokodake" (male bamboo). As the name suggests, please experience the powerful tone this instrument produces. Instant purchase welcome.