Description This item is color filter board, which is a good tool for teaching. Made of material for long time using. It is lightweight and small, so it's convenient to storage. These color filter boards can be combined to create different effects, such as, cool effects, color correcting. Features - Color:Random Color. - Material:Plastic.- Size:5.00X5.00X0.20 cm/1.97X1.97X0.08 inch.- Made of high light transmission plastic materials, lightweight and durable to use.- These color filter boards can create colorful illusion easily and conveniently.- They are widely applied in school teaching, a good tool for cognitive color learning.- Different colored filter boards help bring out some creative effects, such as, cool effects, color correcting.- Great for school teaching, children early educational, physicallearning teaching tools. Packing list: 9 x Color Filter Boards