Features 【Unique Design】:This Prism Beautiful and unique design of cubic six sides can be pervious to light, in the same environment, different Angle different color rendering 【Use Fit】:This Optical Glass Prism Used as a teaching or research tool,Beautiful appearance, can be used for decoration 【Perfect Accessory】:This Cube Optical Glass Prism Can also be used in photography, which can produce a good filter effect 【Special Design】:This Cube Prism 100% quality optical glass, made of K9 optical glass, with better refraction and clear reflection. 【Product Usage】:This Cube Stained Glass 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 Package List