An ultra-fine layer of our exclusive EXP Coating is bonded to the 80/20 Bronze wrap wire which is then wound onto the hex-shaped core wire, resulting in a built-in barrier against corrosion and wear. Strings retain their inherent extra-bright tone and natural feel, yet last 3-4 times longer than traditional strings. These are D'Addario's brightest-sounding extended play strings.

Guages are as follows:

EXP16 (blue label) .012-.053

EXP17 (red label) .013-.056