The OG20 Classical Octave Guitar set includes Professional Series clear high-density nylon trebles and silver-plated wound basses for the first six strings. The extra low strings are specially designed for modern concert guitars with additional basses.
- Trebles: Clear Nylon .025 .029 .036
- Basses: Silver-Plated Wound .025 .030 .037
- String Length: 33"