Specifications Material: Polyester Film Thickness: 0.057mm Size: 15.7 x 19.6 inches / 40 x 50 cm Functional Color Correction Gel adds color effect to the scenery of the scene, providing color correction for theater, film and television. Gel filters create mood and effect by changing the color of the lamp. CTO gel warms shot lights Lighting gel can be used with LED, fluorescent light, tungsten, halogen, strobe lighting. This flexible color gel material can be easily molded and trimmed to fit pin spots, gobos and other lighting fixtures. Light Color Correction Gel is made of premium smooth flat transmission material. Stable color temperature and low light loss Do not install the gel filter directly on the light source. It will melt if you attach it directly. Use the appropriate gel holder or tape the gel to the edge of the barn door away from the lamp, or use gel to cool the light source after 30 minutes.