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. Description: 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.