NYXLs 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. NYXL0942 are designed with super light gauges for maximum flexibility: Plain Steel .009, .011, .016, Nickel Wound .024, .032, .042. Environmentally friendly, corrosion resistant packaging for strings that are always fresh