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Coitak 6 inch Optical Glass Triangular Prism, Crystal Triangular Prism for Teaching Light Spectrum Physics, Photo Photography Prism Tool sold2026 Protect Your Hands In AllCoitak 6 inch Optical Glass Triangular Prism, Crystal Triangular Prism for Teaching Light Spectrum Physics, Photo Photography Prism Tool Product Features Premium Material: Optical prism are made of lead free K9 optic glass, solid and clear, with extremely high light transmittance and light refracting characteristics. Widely Used: This optical triangular prism can be used to separate a beam of white light into its constituent spectrum of colors, ideal