Phosphor Bronze was introduced to string-making by D Addario in 1974 and has become synonymous with a warm, bright, and well-balanced acoustic tone. 

D Addario Phosphor Bronze strings are precision wound with corrosion-resistant phosphor bronze onto a carefully drawn, hexagonally shaped, high-carbon steel core. The result is a long-lasting, bright-sounding tone with excellent intonation.

• D Addario s most popular acoustic guitar string set, known for its superb, long-lasting tone and comfortable playability
• Preferred for its warm, bright, and well-balanced acoustic tone
• Environmentally friendly, corrosion-resistant packaging for strings that are always fresh 
• Made in the U.S.A. for the highest quality and performance
• String Gauges: Plain Steel .012, .016, Phosphor Bronze Wound .024, .032, .042, .053