Custom gauge 7 string set for electric guitar from Nickel Wound Electric Slinky series. Plain strings are made of specially tempered, tin-plated, high-carbon steel, producing a well-balanced tone. Wound strings are made from nickel plated steel wire wrapped around a hex-shaped steel core wire. Strings are precisely manufactured to the highest standards and most exacting specifications to ensure consistency, long life and optimum performance. Gauges: .010, .013, .017p, .026, .036, .046, .056.