Thank you for viewing. This is a set of 4 orchestra tuning Thomastik-Infeld Belcanto strings. I purchased these used, with 8 months of use, and used them for about a year. I've put them on and taken them off several times, so there is some fraying on the winding part, but it doesn't affect the use. Please understand that these are used items. They are easy to tune and have a pure tone. How about trying them?