Features: The Educational Glass glass (40x21x21mm) demonstrates reflection, serving as an essential tool for physics experiments, photography projects, and engaging STEM education, making it a perfect gift. Crafted from glass with a wide triangular designs, this glass efficiently split light beams into rainbow hues, offering a hands on exploration of optics principles. Designed for educators, students, photographers, and science enthusiasts, this glass enhances classroom demonstrations, creative photography, and interactive learning . Use it in classrooms to illustrate refraction, during outdoor photography shoots to captures rainbow effects, or in labs for DIYer science experiments and visual demonstrations. This precisions optics instrument combines durability with clear transparency, enabling repeatable experiments in decomposition and artistic light manipulation. Specifications: Component: Glass Size:Approx.40mm/1.57''x21mm/0.83''x21mm/0.83'' Package Includes: 1Piece optics Triangular glass note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.