Experience Mesmerizing Optics and Science: With our premium quality 4pcs K9 crystal optical prism, witness the breathtaking phenomenon of light refraction. Split beams of light into perfect angles, creating striking and vibrant rainbows or halo effects. A fun, exciting and educational review of the physics, this prism is a perfect science tool. Capture Unique Photography Effects: Elevate your photography skills with our clear glass prism. Impressively useful for photographers, it adds a fantastic flare of rainbow lights to your pictures, without the need for any editing, enhancing the overall visual delight of your shots. Designed for Safe and Interactive Learning: Boasting round edges, our prism is notably safe for handling, especially when used by young learners. It's an exceptional tool for teaching about nature of light and how to create rainbows, making science education fun and engaging. Lightweight, Portable and Gift Ready: Our 50mm prisms (4pcs pack) are convenient to carry, perfect for on-the-go photography or travel adventures. Colour:transparent Material:crystal Size:About 30 x 30 x 30 x 50mm Package Contents: 4 x Clear Triangular Prism Only the above package content, 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 +/- 1-3cm.