These strings dAddario NYXL electric guitar strings medium 11-49 one pack contains 6 pieces. nyxl1149 is designed with larger instruments for players who prefer moderate flexibility and a full, beefy tone. DAddario NYXL guitar strings, on, sing louder, Stay In Tune better than any string you played. Presented, perfected and manufactured by d Addario in New York, the newly developed, shatter-resistant, high-carbon steel core and steel, with alloy creates a whole new level of freedom, trust and power. Provide more strength and NYXL up to 131% more tuning stability by using a completely new wire puller (profession) process in conjunction with a revolutionary "Fusion Twist process for the solid color steels. The nickel-plated string windings have greater magnetic properties in a higher and improved midrange frequency response for more presence and crunch.