D-Addario's XL Nickel Wound strings are their best selling sets and are a standard for many players around the world. Made with a high carbon hexagon steel core and nickel-plated precision steel wrapping, they have a bright and versatile tone that is ideal for many different musicial genres.
 
Heavy Gauge
Plain Steel 0.012, 0.016, 0.020
Nickel Wound 0.032, 0.042, 0.054