I do not have detailed or specialized knowledge. Total length: 182 cm, Width: 26 cm, Height: 8 cm 13 strings - There are scratches on the body. - Operation and functionality are not a problem, but maintenance is the responsibility of the buyer. - Lightly cleaned. - Please understand that this is a used item, so there may be scratches and stains. Everything included is shown in the photos. The cover is dirty, but it will be used to protect the koto from damage during shipping.