Amazon.com: Amlong Crystal 2.5 inch Optical Glass Triangular Prism for Teaching Light Spectrum Physics and Photo Photography Prism, 60mm : Toys & Games
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Right Angle Glass Prism, 32mm x 50 mm - Arbor Scientific
Amlong Crystal 6 inch Optical Glass Triangular Prism for Teaching Light Spectrum Physics and Photo Photography Prism, 150mm: Science Lab Education Curriculum Support: Amazon.com: Industrial & Scientific
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Amazon.com: Young4us 2 Pack 6-inch Crystal Optical Glass Triangular Prism for Photography, Kids, Science, Teaching Light Spectrum, Physics and Taking Photos Pictures (Set of 2, 150mm) : Toys & Games
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