This light filter sheet set is made of sturdy PVC materials and has a . The Lighting Gels can help you get different cool effects, like cool effects and flash light, also good for color correcting. Good saturated enough to cast , available to meet your needs. Features -Color:Red -Material:PVC -Size:29.70X21.00X0.10cm/11.67X8.25X0.04in -Made of high light transmission material, this light filter sheet is light weight, steady color temperature and low loss, helpful to use. -Colored filter sheets are suitable for film, video, photo, stage, theater, party, good for photo flash light LED lights. -Suitable for memory albums scrapbooks and various other art projects, can improve clarity. -Cool effects, this classroom light filters are also good for color correction, involving add and subtract colors, color mixing, color transmission, etc. -Provide eye movement control and helps kids with dyslexia reduce reading frustration. Package list: 7 x Sheets of light diffuser sheets