100% Fluoro-carbon Ukulele Strings “Worth Strings” is made of an special material called Fuluoro carbon. The features are a clear sound and a good balance, so it can be adaptive not only for solo play but also for stroke(strumming) play. Therefore, despite “Worth Strings” is higher price many people choose them, because the length is longer than other company’s string, and you can get two from one of our strings sets as long as normal size ukulele.