This is the H string for a 5-string double bass. It's a used item, having been used for about a year and a half, but it's thick and durable, so I think it can still be used. Recommended for those who want to try out strings or want to save money. The manufacturer is Belcanto. Belcanto is a standard string for use in orchestras, and it produces a thick, soft sound and is a manufacturer that suits various instruments.