Acoustic guitar strings constructed with phosphor bronze wrap wire Played for a dynamic balance of rich, full-bodied tone and sparkling high-end clarity Ultra-thin NANOWEB Coating provides a traditionally textured, “uncoated” feel Our patented coating technology protects against common corrosion, extending tone life longer than any other brand’s coated or uncoated strings (Elixir Strings player survey) Extra Light gauge: .010 .014 .023 .030 .039 .047