The Martin Era™ Phosphor Bronze Treated Acoustic Guitar Strings in Custom Light (11-52) are engineered for rich, balanced tone and long-lasting performance. Treated with a proprietary process that helps resist corrosion and extend string life, these phosphor bronze strings deliver warm lows, sparkling highs, and smooth feel — whether you’re strumming full chords or picking delicate melodies. Their custom light gauge offers comfortable tension and excellent playability, making them a versatile choice for a wide range of acoustic styles. Designed to meet the high quality standards of C.F. Martin & Company, Era™ strings are a reliable, all-around set that stays vibrant and expressive through rehearsals, gigs, and recording sessions.