Cristal Corum Series^High tension^Cristal clear nylon trebles?? Corum silver plated wound basses</br>And CORUM wound basses</br>The set CORUM PR is made of: rectified nylon trebles (with NEW CRISTAL quality)</br></br>Product Description</br></br>The Savarez 500CJ high tension string set for nylon string guitars feature Cristal nylon trebles paired with Corum basses. Cristal nylon trebles are a classic clear nylon string with a very consistent diameter and precise tension?? with very focused?? clear tone. Corum basses offer a very flexible feel while retaining a quick response?? with a high dynamic range.</br><br/>http://www.amazon.com/gp/product/B0002E1P5S