Experience Fascinating Optics and Science: With our high-quality 4-piece K9 crystal optical prisms, witness the breathtaking phenomenon of light refraction. Split light at perfect angles, creating striking and vibrant rainbows or halo effects. A fun, exciting, and educational exploration of physics, this prism is a perfect scientific tool. Capture Unique Photo Effects: Elevate your photographic skills with our clear glass prism. Impressively useful for photographers, it adds a stunning glow of rainbow light to your shots without any editing, enhancing the visual appeal of your images. Designed for Safe and Interactive Learning: Featuring rounded edges, our prism is remarkably safe to handle, especially when used by young learners. It's an exceptional tool for understanding the nature of light and how to create rainbows, making science education fun and engaging. Compact and Gift-Ready: Our 50mm prisms (4-piece pack) are convenient to carry, perfect for on-the-go photography or travel adventures. Color: Transparent Material: Crystal Size: Approximately 30 x 30 x 30 x 50 mm Package Contents: 4 x Clear Triangular Prism Only the above package content is included; other products are not. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real thing. The allowed measurement error is +/- 1-3 cm.