DescriptionThis item is a set of 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 filter boards can be combined to create different effects, such as, cool effects, color correcting.Features- Color: Assorted color. - Material: ABS. - Size: About 18.00X10.00X0.20cm/ 7.07X3.93X0.08inch. - This item is a set of color filter board, which is a good tool for color teaching. - Made from premium material, durable to use. - Exploring property of optics and color, early physics optical science educational toy. - It helps children learn the color of different colors combination. - It is lightweight and small, so it's convenient to storage.