Nickel Bronze strings provide a clear, focused voice with outstanding note definition, balanced projection, and natural acoustic warmth. With the addition of our revolutionary XS coating, XS Nickel Bronze strings obtain both the maximum life of coated strings, with a smooth feel of uncoated strings. Made with a NY Steel core, Nickel Bronze wrap wire, and Fusion Twist technology, these coated acoustic guitar strings have enhanced break strength and tuning stability, as well as a dramatically increased lifespan. 12-53 Light strings are our most popular acoustic gauge, providing a nice balance of playability and tone.