Dunlop Nickel Plated Steel Heavy Core Electric Guitar Strings Heaviest 6 Pack Heavy Core for heavy tones These Dunlop nickel-plated Heavy Core strings are uniquely designed for the player that enjoys higher tension at standard tuning or normal tension at dropped tunings Dunlop's proprietary core-to-wrap ratios are meticulously calculated so the player can really dig in while retaining sound fundamentals Heavy Core steel strings, like all Dunlop guitar strings, are manufactured with the highest quality of materials and engineered for great tone, balance, and feel Gauges: 12-16-20-32-42-54 These Dunlop nickel-plated Heavy Core strings are uniquely designed for the player that enjoys higher tension at standard tuning or normal tension at dropped tunings