Secure the Wrap Wire to Improve Stability and Intonation Robust and resonant tone, excellent sustain Extends String Life by Protecting the Core Wire from Corrosion All veritas sets include both standard plain steel and xenon power-plain strings, which have increased output to balance with the wound strings 11, 15, 22, 30, 40, 50 Set of Six Strings Made in US, New Jersey by DR Music Inc Free Replacement against manufacturing defects only for the products imported by Trimac Products Private Limited contact