Royal Classics specialty treblepaks are perfect for matching with your favorite bass strings * Royal Classics Black Flamenco trebles offer brilliant response and traditional flamenco punch. * The BF30T Black Flamenco treblepak includes 3 traditional black treble strings gauged .77 mm/.028", .85 mm/.033", 1.05 mm/.041" * Royal Classics Black Flamenco trebles are formulated for a bright, expressive authentic flamenco response. * Crafted in Spain by and for serious guitarists.