XT Plain Steel Singles combine their most popular acoustic and electric guitar high carbon steel alloy with an extended lifespan treatment, preserving the natural tone and feel of uncoated strings. Available in various gauges. Features XT Plain Steel Acoustic/Electric Guitar Strings. XT Plain Steels combines our XT coating treatment with the exclusive NYXL, High Carbon Steel alloy for extended life and unprecedented strength. Perfect as a replacement string or for creating customized sets. for both acoustic and electric guitars. All D’Addario strings are designed, engineered, and manufactured in the USA Coating: XT Number Of Strings: 1 Set Type: Singles Fretted Instrument Type: Electric Guitar, Acoustic Guitar