This is a C-tuned kena made of female bamboo, tuned to approximately A=442Hz. (This material has natural brown patterns on the front and back.) ・Size: Total length 27.8cm, mouthpiece inner diameter 17.5-18mm, wall thickness 3mm, largest finger hole diameter 9.5mm, mouthpiece width 9.5mm, mouthpiece depth 7mm ・Surface finish: Lightly coated with camellia oil ・Weight: 37g The sound produced when all holes (6 on the front + 1 on the back) are covered is Do, and the sound produced when all holes are open is Do, one octave higher. The finger holes are small, and it is lightweight and short, making it easy for elementary school students to handle. Instant purchase welcome.