Features: _x000D_Beautiful and unique design of cubic six sides can be pervious to light, in the same environment, different Angle different color rendering _x000D_100% quality optical glass, made of K9 optical glass, with better refraction and clear reflection. _x000D_Used as a teaching or research tool _x000D_Beautiful appearance, can be used for decoration _x000D_Can also be used in photography, which can produce a good filter effect _x000D_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 _x000D_Specification: _x000D_Material: K9 optical glass _x000D_Size: 23 * 23 * 23mm / 0.9 * 0.9 * 0.9in _x000D_Power supply: 1* cr2450 button battery _x000D_ _x000D_Package list: _x000D_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