This is a C-tuned kena made of female bamboo, tuned to approximately A=442Hz. ・Size: Total length 28cm, mouthpiece inner diameter 16.2-16.5mm, wall thickness 3mm, largest finger hole diameter 9.5mm, mouthpiece width 10mm, mouthpiece depth 7mm ・Surface finish: Lightly coated with camellia oil ・Weight: 31g 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" an 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.