Discover the tool for physics with our comprehensive optical lens. Includes a variety of shapes to cater to different experimental needs, making it convenient for teaching and learning. Each lens is ensuring a thorough understanding of light behavior. Features -Color:Transparent -Material:Acrylic -Size:6.20X3.20X1.20cm/2.44X1.26X0.47in - Made of Acrylic material: these optical lens are with high durability to withstand long time using. - Well polished: smooth surface, and does not hurt hands when used, you can use with much more confidence - Lightweight and compact size: the optical lens is easy to carry and store - Clear: These clear optical lens can help students learn and understand more obvious - Practical: Practical teaching tools whether for students to learn about the feature of light or for teachers to conduct teaching Package list: 1 x semicircular lens 1 x rectangular lens 1 x concave convex lens 1 x biconcave lens 1 x biconvex lens