The FXtra is a compact gel holder that facilitates a quick installation and removal of colored gels. Eight Rosco gels are included: CTO, ? CTO, ? CTO, Plus Green, ? Plus Green, Sky Blue, Canary Yellow and Fire Red in the integrated storage pouch. FXtra is sized to use with most popular flashes and the gel pocket accommodates both Rosco and Lee gel samples. Any LumiQuest accessory (and many other brands) can be attached while FXtra is in place allowing you to colorize the light while using a variety of light modifiers.