Darco Acoustic 80/20 Bronze Wound Light, .012 - .054, D-5100 1st E Plain Steel .012 2nd B Plain Steel .016 3rd G 80/20 Bronze Wound .025 4th D 80/20 Bronze Wound .032 5th A 80/20 Bronze Wound .042 6th E 80/20 Bronze Wound .054 Darco acoustic strings are made with value in mind. Fully aware that a need for value should not compromise tone or inhibit your musical creativity. Darco acoustics are engineered and produced within strict tolerances.