No. of Strings: 6-String Set Gauge Range: 10 - 26 Gauges: 10 , 14 , 9 , 12 , 18 , 26 . (Plain 3rd) Wrap Material: Nickel Plated Construction: Round Wound Hex Core / Round Core: Hex Core Ball End / Double Ball End: Ball End Coated / Non-Coated: Non-Coated D'Addario EXL150H Nickel Wound Electric Guitar Strings 10-26 Nashville High Strung D'Addario XL Electric Guitar strings are world-renowned as "The Player's Choice" amongst guitar players of all genres and styles. XL strings are wound with nickelplated steel and are known for their distinctive bright tone and excellent intonation. This High-Strung Nashville Tuning gauge basically uses the octave strings from a 12-string set to give you a 12-string sound out of your 6-string guitar.