Power wound strings for electric guitar, medium-heavy gauge. - String Type: Electric Guitar - Gauge: 0.12-0.54 - Model: S12524 - Construction: Power Wound - Size: Medium Heavy - Quantity: 4 packs One pack's bag is scuffed because it was carried in a guitar case. All are unopened. I am selling these because I am changing the type of strings I use. Thank you for looking.