Description:Triangular prism with a base is very convenient to change prismangle. It can be used in science class of kindergarten, primary school, highschool, as a demonstration equipment, to study the dispersion of light. It alsocan be used as toy to develop intelligence of children.Features:1. Made from high quality optical glass, the prism part can be removedfor single use.2. Precise cuttings offer good reflections and light separation.3. Come with a stand, convenient to change prism angle.4. Can be used for teaching physics light spectrum.5. Used in science experiments involving light spectrum.Specifications:Material: plastic stand, optical glass prismStand Color: blackSize (L*W): 17*12cm/6.69*4.72inWeight: Approx. 109gPackage Includes:1 x Optical Triangular Prism1 x Black StandInstruction:Put prism under sunlight.Rotating prism till light appear seven colors on a wall or white paper.Note:Please allow small deviation due to manual measurement. Thanks foryour understanding.