The Westcott Vivid Pack of FlexiGels for FJ400 Strobe Light allows you to add a dramatic pop of color to your photos without the headaches of traditional film-based gels. Their patent-pending design easily slides over the strobe's glass dome, instantly adding dynamic color to your subject and scene. This 8-pack of color gels includes Vivid Red, Orange, Yellow, Green, Teal, Blue, Purple, and Pink. You can create a range of color intensities with one gel by adjusting your light's power level. FlexiGels are the last color gels you will ever need to buy. Made of silicone rubber, they are durable, heat-resistant, and fit like a glove over the FJ400 strobe's glass dome - slide one of these flexible rubber gels on for endless creative lighting options. No gaff tape or clips are required to hold them in place. FlexiGels are compatible with third-party strobes with a 2-inch height x 3.4-inch diameter glass dome and adequate ventilation hole alignment. With a FlexiGel attached to your FJ400 strobe, mount your light modifier and you are ready to film. They pair perfectly with light modifiers including Rapid Box Switch, umbrellas, and softboxes. When your photo session is a wrap, let your FJ400 cool for at least 5 minutes before removing the gel. Slide the FlexiGel off your strobe and store it in the included microfiber case for lint-free storage.