Description These optical lens for physics teaching are made from stable materials, being safe and durable to withstand long time using. These concave lens and convex lens can help students learn and understand more specifically and obvious how to find the principle of light convergence. Compact size, easy to take, use and clean, you will feel the convenience of them. Features -Color:Transparent -Material:Acrylic -Size:5.90X2.90X0.80cm/2.32X1.14X0.31in(rectangle) -Diverse optical lens combinations, convenient and practical to use, catering to various experimental requirements. -Suitable for physics optics experiments, specifically designed for middle school scientific experiments, facilitating comprehensive understanding of optical principles. -Optical lens set is crafted from stable material, ensuring exceptional light transmission, excellent durability, simple to clean and easy for maintenance. -Exceptional precision, optical lens surfaces are meticulously 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: 1 x Set of Physics Optics Lens(7Pcs/set)