D'Addario's pioneering Phosphor Bronze acoustic guitar strings are an industry standard in acoustic strings with its beautiful sonic balance and tonal warmth. A hexagonal high-carbon steel core with precision wound phosphor bronze wrap wiring it is suitable for a wide range of acoustic styles and music genres.
 
Medium Gauge
Plain Steel 0.013, 0.017
Phosphor Bronze 0.026, 0.035, 0.045, 0.056