Designed for precision and clarity, this rectangular clear glass block is great for scientific experiments and educational demonstrations. Its sturdy construction ensures use, while the clear surface enhances visibility of light paths, making it an excellent tool for studying optical refraction. Features -Color:Transparent -Material:Glass -Size:7.50X3.90X1.50cm/2.95X1.53X0.59in -Improved accuracy: the clear glass surface reduces glare and reflections, enhancing the precision of light refraction experiments and providing clearer, more accurate results. -Educational resource: this glass block is a valuable tool for teaching and demonstrating optical principles, making it an essential addition to any science or physics classroom. -Sturdy construction: made from durable glass, this block is designed to withstand frequent use and handling, ensuring longterm reliability and performance. -Convenient design: the rectangular shape of the glass block allows for easy positioning and alignment in experiments, providing a larger surface area for comprehensive optical studies. -Versatile application: ideal for use in schools, laboratories, and home teaching environments, this glass block supports a wide range of physics and optics experiments, making it a versatile educational tool Package list: 6 x glass bricks