Feature●Use this triangular prism to split a beam of light into its spectral components (the colors of the rainbow).●Side Length: 1.38 inch / 35mm, More Than Average Width, Stable Handheld.●Show your kids a rainbow, or have photography fun.●Material: Optic glass, not plastic.●With AMLONG CRYSTAL Authentic Brand Logo Box, Fully Protected Package.Description Not for children under 3 yrs. Prism Length: Approx. 2.5 inch / 60mm