The hand crank is a customary instrument. It is a deep-drawn, hollow interior and shaped convex lens from two half-shells. The top ("ding") side has a central 'note' hammered in it and seven or eight 'tone fields' hammered in the center. The bottom ("Gu") is a regular surface with a rolling hole in the center that, when the edge is struck, produces a tuned note. feature: High-quality hand-cranked pot, carbon steel material, sturdy and durable. 9 note design, 1 mid and 8 pitch fields, D3/A3/C4/F4/A4/D5/C5/G4/D4. Usually played with hands and fingers, it produces a soft, warm sound. Suitable for street performances, festivals, gatherings of family and friends, etc. Comes with a carry bag for easy storage and portability, and a metal stand for easy access. Specification: Material: Carbon Steel Size: 56*23cm/22*9.1inch