Fender 60-12 L Phosphor Bronze 12-String light guage acoustic guitar strings offer rich, full, warm, acoustic tone with brilliant highs and ringing clarity. Fender 60-12 L Phosphor Bronze 12-String sets provide you with an excellent balance of tone and long life that can only be found Fender's in our formula. 60-12 L Phosphor Bronze 12-String guitar strings are everything you've always wanted in an acoustic string.