The Ernie Ball Skinny Top Heavy Bottom Slinky Nickel Wound Electric Guitar Strings are the perfect hybrid set for those who like thick bottom strings without sacrificing the ability to solo on smaller strings. These strings are precision manufactured to the highest standards and most exacting specifications to ensure consistency, optimum performance and long life. The wound strings are made from nickel plated steel wire wrapped around a hex shaped steel core wire. The plain strings are made of specially tempered tin plated high carbon steel producing a well-balanced tone for your guitar. Gauges .010, .013, .017, .030, .042, .052. Features: Precision manufactured to the highest standards Ensure consistency, optimum performance, and long life Wound strings made from nickel plated steel wire wrapped around a hex shaped steel core wire Plain strings are made of specially tempered tin plated high carbon steel Produce a well balanced tone for your guitar