Features: Best gift for kids: Show your children the spectrums of color and explore the magically optical for theory with your kids and friend. Cool sciences experiment: A great tool for teaching refractions and science education in physics classroom. It can also be used for art photography effects, wedding and birthday parties and some other outdoor event. Quality optical spectrum glass, craft with optical glass with better refractions effects and clear reflection. Great photography tool: The Triangular Prism is clear and beautiful, which can used as a great tool for taking photos to help you take cool photos. Light spectrum teaching: Show wonderful colorful optical effects for your kids or students, so you can explain these great natural sciences to them. Specifications: Component: Glass Size: Approx. 24.4x21x26x24.4mm/0.96x0.82x1.02x0.96 inches Package Includes: 1 Piece Triangular Prisms note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color the item.