K9 Optical Glass Right Angle Reflecting Triangular Prism for Teaching Light Spectrum Equipment Features: Make a Rainbow by Refraction Easily - It produces rainbows using direct sunlight and can also be used for some cool photography effects! Cool Science Experiment You Can Do at Home - You can explain to kids that light is actually made up of a spectrum of colors and talk about how rainbows form and then cement the information with a demonstration. Trying the Instagram Rainbow Trend - Using a prism in front of your lens can really make a vivid large rainbow across your face. It will be nice to add to your photography supplies. Makes a Great Gift - Most people at age would have a lot of fun playing with it. Specifications: Material: K9 Optical Glass Size: 14x14x80mm/0.55x0.55x3.15" Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item.Thank you! No Retail Package Package Contents: 1 x Triangular Prism _x000D_