Clothes Kit Metal Cutting Dies S K9 Optical Glass Right Angle Reflecting Triangular Prism For Teaching Light Spectrum Specifications: 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 Package includes: 1 x Triangular Prism Notes: Transition: 1cm=10mm=0.39inch Size for manual measurement, there may be a 0 to 2 cm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Feedback: If you are happy with your purchase please give us the highest rating since your comment is very important for our success. Please don't leave negative feedback if there is any problem, and give us the opportunity to do our best to provide the best service to resolve the problem.