Material: Made of high light transmission, these film plastic sheets are made of high light transmission material with lightweight, steady color temperature and low loss Function: Color filters are used for lighting effects and color correction, involving additive and subtractive color, color mixing, color transmission, absorption and filtering of the different wavelengths of light. Size: Each gel filter size is 15.8x19.7 inch, comes with protective coverings, protect the filter from being scratched Free Combination: you can freely combine different colour filters to simulate different types of light and create cool effects. Suitable for: Colored overlays filters are suitable for film, video, photo, stage, theater, party, and DJ lighting, good for photo studio strobe flash light LED lights