Product description 9 note - (d3a BB C D E F G A) Beautiful vibration. Material: Steel Diameter: 22 inches (56cm) Height: 10 inches (25.6 cm) -How to adjust the new hand wheel? - For extremely precise tuning, use the linotune tuner. Any given overtone can be measured. -How to care for hand plate- Don't hit hard. Avoid direct sunlight and high humidity. -How to play the hand wheel- Please don't hit like jambe and Conga, Tap with your fingertips, and you'll be playing enough beautiful overtones.