Traveler Guitar nickel steel electric guitar strings are compatible with all Traveler Guitar electric models and all other traditional 6-string electric guitars. Made in the USA, our electric guitar strings are manufactured with a high carbon steel core and nickel-plated steel wrap wire. Custom-Light Gauge E - 0.010" B - 0.013" G - 0.017" D - 0.026" A - 0.036" E - 0.046"