Buy 3 sets and save with this environmentally friendly, corrosion resistant 3-pack. NYXL?s feature D?Addario?s exclusive New York manufactured, high carbon steel alloy for unprecedented strength ? Play Fearlessly. Improved tuning stability compared to traditional nickel wound strings - get in tune faster, stay in tune better. Wound strings with enhanced mid-range frequency response in the 1 - 3.5 kHz range ? more presence and crunch to cut through the mix. NYXL1149-3P offers moderate flexibility and a full, beefy tone: Plain Steel .011, .014, .018, Nickel Wound .028, .038, .049. .