Condition: Brand New_x000D_ Item Type: Prism_x000D_ Material: K9 Optical Glass_x000D_ Product Size: Approx. 15x15x15mm/0.6x0.6x0.6in, 20x20x20mm/0.8x0.8x0.8in (optional) 1、Beautiful and unique design, it can be used as a decoration or a teaching tool. 2、High quality optical glass prism, made of K9 optical glass with better refraction. 3、The delicate optical glass triangular prism can be given as a gift to your children. 4、There will be completely different color rendering from different angles at the same environment. 5、Optical glass RGB prism, there are four lights, one of the white light from the lighting surface, the remaining three light from the three primary colors red, green and blue, respectively three base light.1 x Prism