These D'Addario NYXL guitar strings are perfect for both amateur and professional guitarists. Whether you're performing on stage, recording in the studio, or just jamming at home, these strings will give you the best sound. The strings are made of an exclusive high - carbon steel alloy from New York, offering great strength and tuning stability. They come in a corrosion - resistant and environmentally friendly package to keep them fresh. The gauge is 9.5 - 44, which is suitable for light - plus string set needs.