Description:The large optical prism with base is very convenient to change the prism angle. It can be used in the science classroom of kindergarten, elementary school, high school, as demonstration equipment, to test light dispersion. It can also be used as a toy to develop children's intelligence. Features:1, Very convenient to change the prism angle.2, Can be used to teach the physics of the light spectrum.3, Used in scientific experiments involving the light spectrum.4, Precise cuttings, offer good reflections and light separation. Specifications:Material: Plastic base, high-quality optical glass prismBase color: BlackSize: 8x2.5x16cmInstruction:Place the prism under the sun. Rotating prism until the light appears seven colors on the wall or white paper. Package Included:1 x Prism1 x Handle Base