Feature: 1. Material: Meniscus lenses are made of high grade optical glass with high accuracy.2. Clear Imaging: The length can up to ‑30.97, the imaging is clear, highly polished, and edged. 3. Applicability: This optical lens is ideal for physics classroom demonstrations of optics and light refraction. 4. Educational Devices: Educational grade optics for fundamental research in geometric optics. 5. Portable: Small size, light weight, easy to carry, excellent teaching aid for teachers. Specification: Item Type: Concave Convex Lens Package List: 1 x Lens |