Description: _x000D_ 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. _x000D_ _x000D_ Features: _x000D_ 1. Made from high quality optical glass, the prism part can be removed for single use. _x000D_ 2. Precise cuttings offer good reflections and light separation. _x000D_ 3. Come with a stand, convenient to change prism angle. _x000D_ 4. Can be used for teaching physics light spectrum. _x000D_ 5. Used in science experiments involving light spectrum. _x000D_ _x000D_ Specifications: _x000D_ Material: plastic stand, optical glass prism _x000D_ Stand Color: black _x000D_ Size (L*W): 17*12cm/6.69*4.72in _x000D_ Weight: Approx. 109g _x000D_ _x000D_ Package Includes: _x000D_ 1 x Optical Triangular Prism _x000D_ 1 x Black Stand _x000D_ _x000D_ Instruction: _x000D_ Put prism under sunlight. Rotating prism till light appear seven colors on a wall or white paper. _x000D_ _x000D_ Note: _x000D_ Please allow small deviation due to manual measurement. Thanks for your understanding.