A four pack of EP.20/20 yo-yo string in an Unknown Edition, made by Zipline Strings of Idaho. The pack came with four different colored strings: black, white, gray, and black/white. The string is a polyester/nylon blend and each string's length was 21.92 cm (48 inches).
This limited string pack edition was made to complement the many Unknown edition yo-yos that various manufacturers have made over the years, including Duncan with their Freehand AL - Unknown 1 and Unknown 2 yo-yos.
