Function: 1.Beautiful and unique design, can be used as decoration or educational tool. 2. High quality optical glass prism, made of K9 optical glass with better refractive index 3.Delicate optical glass triangle prism is also a great gift for kids. 4. Different angles will get very different color rendering even in the same environment. 5. Optical glass RGB prisms have 4 lights, 1 white light from the lighting surface, the other 3 are 3 basic lights from red, green and blue in three primary colors. Specifications: Condition: 100% Brand New Item Type: Prism Material: K9 Optical GlassProduct Size: Approx. 15x15x15mm/0.6x0.6x0.6in, 20x20mm/0.8x0.8x0.8in (optional) Package List: 1 x Prism