Colored lighting filters, or gels, are often used as accent lights, or to add dramatic color to backgrounds or selected portions of a scene for artistic effect.
Correction filters are typically used to adjust the color temperature of a flash to better match other light sources to improve overall color balance in an image.

What flash brands will the  Universal Gels fit?

With a coverage area of (65mm x 64mm) Selens Universal Gels are large enough to cover even the largest flash heads, and they can be creased or trimmed for smaller flash heads as desired. These flash gels' innovative tabbed design allows them to be quickly attached to a wide range of shoe mount flash brands, including : for Canon, for Konica,for Metz,for Minolta, for Nikon, for Nissin, for Olympus, for Panasonic, for Pentax, for Quantum, for Sigma, for Sony, for Vivitar, for Oloong, for Yongnuo and for Triopo.

How do Universal Gels attach?

You do not need to buy expensive or bulky holders, or use annoyingly sticky hook-and-loop to attach Universal Gels to your flash. Included with each Universal Kit is the Gel-Band.  Universal Gels unique tabbed design means that they quickly attach to almost all standard shoe mount flashes. To attach, simply slip the tabbed ends of the Universal Gel under the Gel-Band to secure it to the flash.

Package including:

20 x Speedlite Color Filters