This is a Color Correction Gel Light Filter.Functions: *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 *Used in film, video, photo, stage, theater, party, and DJ lighting.* Colors: Trans-Blue*Spirit Level only, other accessories demo in the picture is not included! Feature:*IMaterial: Made of high light transmission material with light weight steady color temperture and low loss.Durable. Size: Approx. 20x20cm/7.8x7.8'' *Color: Trans-Blue*Packing including: 8 * Gel light filters (one color for 8 pieces)Note:*1.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid.*2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.*3.Keep away from Fire!*4.Be careful of cut hands. Not suitable for child under 3 years old!5.Please don't attach the gel filter to modeling lamp or it will be melted.Thank you! *Package Included: 8 x Flash Color Gels Packing SafelyIn plastic bag in boxesFor more choice for Photographic equipment accessories , Welcome to Winsang Store