.012 .016 .024w .032 .042 .052 - set / Acoustic Guitar Phosphor Bronze Wound Hexagonal core Light Gauge PYRAMID Premium Bronzeacoustic guitar strings are very durable and offer the typical brilliant sound of bronze strings. The phosphor content provides a tone that keeps longer brilliant. The bronze wires are wound on a hexagonal core and sound very crisp and are rich of overtones. These strings are the first choice for stage and studio.