UNI-Yarn is a standard, 2-strand, twisted, acrylic fly tying yarn, spooled instead of carded for convenience and to reduce wastage. UNI-Yarn comes in twenty-six colours: Black, Black/Camel,Burnt Orange, Brown, Bronze, Cream, Gold, Olive Green, Grey, Insect Green, Kelly Green, Khaki, Dark Brown, Dark Grey, Light Yellow, Magenta, Olive, Orange, Purple, Pale Yellow, Red, Salmon, Sand, Sun Yellow, White, Wine. It is also available in Combo Pack of 20 spools.