D'Addario Nickel Bronze strings are made with nickel-plated phosphor bronze, wrapped over a hexagonal NY steel core. The nickel-plated phosphor bronze wrap wire provides a clear, focused sound, which magnifies the sonic properties of the guitar’s wood Nickel-plating increases natural corrosion resistance for a longer lasting uncoated string. | Our Nickel Bronze acoustic guitar strings come with a code on the recyclable VCI bag, which you can register to earn Players Circle points. D’Addario Nickel Bronze strings are made in the USA—drawn to our exacting specifications at our New York production facility. |