Nickel electric guitar strings, medium-heavy gauge, offering a diverse range of tones. - Model: S1254 Med-Heavy - Material: Nickel - Gauges: .012 .016 .022P .032 .042 .054 One set was carried in a guitar case, so the bag has some scuffing. All sets are unopened. I'm selling these because I'm changing the type of strings I use. Thank you for looking.