23mm Optical Glass Prism Cube Six Sided Light Refractor for Science Photography Features:<br> Beautiful and unique design of cubic six sides can be pervious to light, in the same environment, different Angle different color rendering<br> 100% quality optical glass, made of K9 optical glass, with better refraction and clear reflection.<br> Used as a teaching or research tool<br> Beautiful appearance, can be used for decoration<br> Can also be used in photography, which can produce a good filter effect<br> 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<br> Specification:<br> Material: K9 optical glass<br> Size: 23 * 23 * 23mm / 0.9 * 0.9 * 0.9in<br> Power supply: 1* cr2450 button battery<br> <br> Package list:<br> 1 x Optical Glass Prism