Augustine 3XAR-BL High Tension Regal/Blue Strings - 3 PackIMPERIAL AND REGAL TREBLE SERIES Because of their brilliant projection and clear, bell like tone, Augustine Imperial and Regal Treble Strings are the preferred choice of nearly all of Augustines endorsing artists. With a clearer, slightly more rigid nylon formula referred to as Cristal these are considered by many to be the ultimate in nylon treble strings for the classical guitar. They boast perfect intonation, long life, excellent ability to hold