This is a set of two ukulele string sets. The AJA MOANA ukulele strings are made of black nylon and are for soprano and concert ukuleles. The model number is AU-500. The D'Addario ukulele strings are clear nylon strings for soprano ukuleles, model EJ65S. They are characterized by a warm and resonant acoustic tone. Both are unused, but please understand that they have been stored at home for over 3 years after purchase before buying. [Brand] AJA MOANA, D'Addario [Category] Ukulele Strings [Condition] New [Color] Multicolor [Other] Compatible with soprano and concert ukuleles Thank you.