4 Sizes X-Cube Defective Cross Dichroic Prism RGB Combiner Splitter Glass. 1 x Optical Glass Prism RGB Prism. -Optical Glass RGB Prism, there are four lights, white light in any one of the illuminating surface intake, from the remaining three light shoot out three base colors of red, green and blue, respectively, is said three bases of the light.
eBay