Purchased in October 2025 and used for 3 hours daily for one month. While used, there are no noticeable scratches or stains. These are strings released by Evah Pirazzi Neos, and I'm selling them because I want those interested to try them out. They sound quite good. All four strings are included. Features a flexible yet powerful sound with transparency and nobility. Designed with the cooperation of the world-renowned violinist Janine Jansen, they exhibit excellent stability and ease of handling right from the start. Rich overtones harmonize with a clear fundamental tone, achieving smooth sound transitions and high projection. The special gold E string adds depth and brilliance, maximizing the instrument's expressive power. These are next-generation high-performance strings, suitable for players seeking a new standard.