<p><b>Descriptions:</b></p> This color filter set consists of 4 -12x 12"/30x30cm gel sheets, (Red, Yellow, Green and Blue). <p>Made of high light transmission materials with light weight, steady color temperature and low loss. </p> <p>Mixing primary color filters are used for experiments involving additive and subtractive color, color mixing, color transmission, absorption and filtering of the different wavelengths of light. </p> <p><b>Package contents:</b> </p> <p>(1) Red color Gel </p> <p>(1) Yellow color Gel </p> <p>(1) Green color Gel </p> <p>(1) Blue color Gel</p>