Features: Beautiful and unique design of cubic six sides can be pervious to light, in the same environment, different Angle different color rendering 100% quality optical glass, made of K9 optical glass, with better refraction and clear reflection. Used as a teaching or research tool Beautiful appearance, can be used for decoration Can also be used in photography, which can produce a good filter effect The product is equipped with a cool black gift box. After opening the gift box, the built-in light will be opened, colorful light will appear, and the light will be extinguished when closed Specification: Material: K9 optical glass Size: 23 * 23 * 23mm / 0.9 * 0.9 * 0.9in Power supply: 1* cr2450 button battery Package list: 1 x Optical Glass Prism 1Beautiful and unique design of cubic six sides can be pervious to light, in the same environment, different Angle different color rendering 2100% quality optical glass, made of K9 optical glass, with better refraction and clear reflection. 3Used as a teaching or research tool 4Beautiful appearance, can be used for decoration 5Can also be used in photography, which can produce a good filter effect