Gauges 12-16-24-32-42-54. Wound with "Alloy 52", these GHS WBL White Bronze Light Acoustic Guitar Strings are magnetically active, which makes them ideal for acoustic/electric applications. The material also resists corrosion to help players with high acidity and those that live in humid climates. GHS has made the highest quality strings since 1964. The choice of numerous guitar greats.