This physics optics experiment is an essential addition to any science classroom. The lenses are easy to handle and can be used in various experimental setups, making them versatile tools for teaching and learning. Features -Color:Transparent -Material:Acrylic -Size:6.20X3.20X1.20cm/2.44X1.26X0.47in -Diverse optical lens combinations: convenient and practical to use, catering to various experimental requirements. -Suitable for physics optics experiments: designed for middle school scientific experiments, facilitating comprehensive understanding of optical principles -Stable material: ensuring exceptional light transmission, excellent durability, simple maintenance -Exceptional precision: optical lens surfaces are processed to ensure precise reflection and refraction of light -Lightweight and portable: proper size, easy to use and store, can be used for school, laboratory, classroom Package list: 2 x semicircular lens 2 x rectangular lens 2 x concave convex lens 2 x biconcave lens 2 x biconvex lens