Includes 6 pieces of transparent round flat glass lenses in various sizes (23mm, 24mm, 25mm, 27mm, 28mm, 32mm, 34mm) for versatile applications. Crafted from premium, optically polished glass with smooth, ground edges for safe handling and assembly. devised to enhance your flashlight's performance, providing an expanded perspective for crisper and more detailed imagery. Perfect for educational purposes in physics, demonstrating concepts of optics and light effectively. Please note: manual measurements may have a ±0.2 inch variance; color shifts may occur on different display screens.