This middle school optical lens set is suitable for teaching the principles of light and optics. The isosceles triangular prisms are made from optical glass, ensuring accurate and in experiments. This set is ideal for classroom demonstrations, helping students grasp of light behavior and spectrum physics. Features -Color:Transparent -Material:Glass -Size:8.50X4.20X1.00cm/3.34X1.65X0.39in -Clear material: made from glass, ensuring clarity and precision in experimental results -Easy to use: simple design allows for straightforward operation, ideal for beginners -Educational versatility: suitable for various middle school physics experiments, enhancing -Concept : aim at the understanding of optical principles through hands on practice -Durable design: built to withstand regular use, providing longterm reliability in educational settings Package list: 1 x Optical Glass Triangular Prism