Science Lab Triangular Prism

Specification:

Use this triangular prism to split a beam of light into its spectral components (the colors of the rainbow).
Side Length: 38mm, 50mm etc , More Than Average Width, Stable Handheld.
Show your kids a rainbow, or have photography fun.
Material: optic glass, not plastic.
Product description
This prism is made of premium K9 crystal polished glass, can be made by different length 150mm,100mm etc , and size 30mm, 38mm, 50mm  in side length.