Experience Fascinating Optics and Science: With our high-quality 4-pack K9 crystal optical prism, witness the breathtaking phenomenon of light refraction. Split light into perfect angles and create striking and vibrant rainbows or halo effects. A fun, exciting and educational introduction to physics, this prism is a perfect science tool. Capture Unique Photography Effects: Improve your photography skills with our clear glass prism. Impressively useful for photographers, it adds a stunning flare of rainbow light to your images, without the need for editing, enhancing the overall visual enjoyment of your . Designed for Safe and Interactive Learning: With rounded edges, our prism is remarkably safe to handle, especially when used by young learners. It is an exceptional tool for teaching about the nature of light and how to create rainbows, making science education fun and engaging. , Portable and Gift-Ready: Our 50mm prisms (4-pack) are comfortable to carry, perfect for photography on the go or travel adventures. Color: transparent Material: crystal Size: Approx. 30 x 30 x 30 x 50 mm Package Contents: 4 x Clear Triangular Prism The above package contents only, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.