This is a C-tuned kena made of female bamboo, tuned to approximately A=442Hz. ・Size: Total length 28.1cm, mouthpiece inner diameter 16.5-17mm, wall thickness 3mm, largest finger hole diameter 9.5mm, mouthpiece width 10mm, mouthpiece depth 7mm ・Surface finish: Lightly coated with camellia oil ・Weight: 34g When all holes (6 front + 1 back) are covered, the sound is Do, and when all holes are open, the sound is Do an octave higher. The finger holes are small, and it's lightweight and short, making it easy for elementary school students to handle. Instant purchase welcome.