Features:100% Brand new and high qualityWith a decent gift box，it is a good present for friendsTriangular prisms are used to disperse light， that is to break light up into its spectral components(the colors of the rainbow). It can reflect seven-color sunlight and it is a good tool to teach children to explore the mysteries of light， stimulate a child's thirst for knowledge， and improve the children's interest of understanding the magic world.Specifications:Prism dimension(L x W x H): 100mmx30mmx30mmMaterial: optical glassPrism color: ClearPackage Includeds:1 x Triangular Prism