Feature 1Easy to Use: This optical glass prism is easy to use, just position the prism so that the light shines through it, and there should be rainbows dancing on the opposite wall. 2Spectrum Exploration: This RGB dispersion prism encourages your kids to explore colorful spectrum and stimulate their interests in physics. 3Wide Application: This optical dispersion prism is ideal for teaching of optics, science experiments, decoration and for photography. 42 Pieces: You will receive 2 pieces of RGB glass prisms in total, adding some artistic ambience to your cafe, bar, home, bedroom and living room. 5Perfect Gift: This crystal glass prism with fantastic refraction effect will surprise your kids, students, friends and family, especially who is photography enthusiast.Item Type: Optical Glass PrismMaterial: Optical GlassUse: Ideal For Teaching Of Optics, Science Experiments, Decoration And For Photography.Product Size: Approx. 1.4 x 1.4 x 1.4cm / 0.55 x 0.55 x 0.55in ( Manual Measurement, Slight Error May Exist ) .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List2 x Optical Glass Prism