.011 .015 .022w .030 .040 .050 - set / Acoustic Guitar Phosphor Bronze Wound Hexagonal core Semi Light Gauge PYRAMID Premium Bronze acoustic 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.