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Triangular Prism K9 Optical Glass, RGB Light Refraction Teaching Tool, Science Experiment Prism with Unique Color Rendering for Physics Study, Decoration and Gift, Size 20x20x20mm (15 * 15 * 15)
Triangular Prism K9 Optical Glass, RGB Light Refraction Teaching Tool, Science Experiment Prism with Unique Color Rendering for Physics Study, Decoration and Gift, Size 20x20x20mm (20 * 20 * 20)
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