RARE Acoustic Guitar Strings utilize a phosphor bronze wrap wire over a hexagonal high-carbon steel core The result is warm, bright and balanced tone with an overall fatter and louder sound with a deep bottom end Acoustic guitars of all types seem to benefit from a distinct improvement in tone, depth, and sustain 11, 15, 22, 30, 40, 50 String Length: 38" Made in US, New Jersy by DR Music Inc Free Replacement against manufacturing defects only for the products imported by Trimac Products Private Limited contact