Reddit reviews Optical Glass Triangular Prism Refactor for Teaching Light Spectrum, Photography Effects. K9 Crystal Clarity, 140mm

[Multi Purpose] - Use the Sunlight for the Best Rainbow Science Experiment Effects. Use as Photo Tool to Create better Photography scenes.[Made from K9 Crystal] - Unlike Glass, K9 Crystal is much more durable and clear. Zero Fogginess and Scratches. Contains NO LEAD.[Photography Prop] - Prisms can be used for photography as well as creating the light spectrum. For BEST Rainbow results, use the Sun.[Smudge Free] - Each Prism is hand inspected. A Micro Fiber cloth will be included in each carrying case to ensure prism maintains flawlessness.[Satisfaction Guarantee] - MRG keeps customers happy by ensuring quality control. If unhappy about quality, RETURN for FULL REFUND. No Questions Asked.