This optical lens designed for physics and science experiments, with various types of lenses, such as convex and concave, which are essential for demonstrating optical principles, it enhances understanding of light behavior and optics. Features -Color:Transparent -Material:Acrylic -Size:6.20X3.20X1.20cm/2.44X1.26X0.47in -Comprehensive: optical experiment essential lenses, catering to various experimental needs in physics and optics -Versatile application: ideal for use in schools, laboratories, and other funny and research settings -Accurate results: designed to ensuring precise experiment, enhancing learning experience -User-friendly: simple and easy-to-use, suitable for both beginners and professionals, making it accessible to all -Learning: offers wealth of experimental content, helping students gain deeper understanding of optical principles Package list: 1 x semicircular lens 1 x rectangular lens 1 x concave convex lens 1 x biconcave lens 1 x biconvex lens