Features: brand new and high quality Best gift for kids: Show your children the spectrum of colors and explore the magical optical for theory with your kids and friends. Cool science experiment: A great tool for teaching refraction and science education in physics classroom. It can also be used for art photography effects, wedding and birthday parties and some other outdoor events. High quality: Premium quality optical spectrum glass, made of K9 optical glass with better refraction effects and clear reflection. Great photography tool: The Triangular Prism is clear and beautiful, which can be used as an auxiliary tool for taking photos to help you take cool photos. Light spectrum teaching: Show wonderful rainbow optical effects for your kids or students, so you can explain these great natural sciences to them. Package Includes: 1 Piece Triangular Prism Specifications: Material: Glass Size: Approx. 24.4x21x26x24.4mm/0.96x0.82x1.02x0.96 inches note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflec0.75 the actual color of the item.