Designed for less bar and finger noise, our semi-flat winding process produces a string with rich tone and vibrant sound, while keeping the tuning stability needed by all steel players. "The E13th tuning was used by many famous players in the mid 1940's and 50's, but Steel Guitar Hall of Fame member Jerry Byrd did more to make this tuning famous than anyone." - Scotty • MFSKU SC6E13th • UPC 649687405045