This is a high quality, optically true lens. Designed for educational purposes, but is also ideal for top spinning.
Eisco produces high-quality, trusted science education products and solutions to help students explore and discover science through hands-on experiences.
They produce more than 8,000 unique products for the science education and scientific research markets. Their core product lines include: Biology Models, Laboratory Glassware and Plasticware, Lab Equipment and Supplies, Physics Supplies and Apparatus, Rock and Mineral Specimens