This is an oto-o (sound string) for Nagauta shamisen. I use this for Tsugaru-jamisen and Jiuta-jamisen. The width is the same as the thread path of the koma (bridge), so the strings are aligned straight, resulting in a clear and crisp sound. I was taught this by my Tsugaru-jamisen teacher. This oto-o is made of beautiful, lustrous silk. - Color: Navy blue - Design: Simple - Material: Silk Thank you for looking.