Feature 1Made from high quality optical glass, the prism part can be removed for single use. 2Precise cuttings offer good reflections and light separation. 3Come with a stand, convenient to change prism angle. 4Can be used for teaching physics light spectrum. 5Used in science experiments involving light spectrum.Specification Triangular prism with a base is very convenient to change prism angle. It can be used in science class of kindergarten, primary school, high school, as a demonstration equipment, to study the dispersion of light. It also can be used as toy to develop intelligence of children. Features: 1. Made from high quality optical glass, the prism part can be removed for 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 prism Stand Color: black Size (L*W): 17*12cm/6.69*4.72in Weight: Approx. 109g Package Includes: 1 x Optical Triangular Prism 1 x Black Stand Instruction: 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 for your understanding.