D'Addario EJ88S sets are designed for use with all soprano ukuleles. Each string within this set is made from our exclusive Nyltech material and optimized for GCEA tuning. Optimized for Soprano Ukuleles tuned to GCEA tuning Exclusive Nyltech material for traditional Ukulele tone Preferred for warm, gut-like overtones String Gauges: Nyltech .024, .030, .036, .026 Made in the U.S.A. for the highest quality and performance