Description
GSC International 000-105-CS Cover Glass with Fire-Polished Edge, 50mm Diameter, Case of 100
The borosilicate Cover Glasses have fire-polished edges and a concave shape. These Cover Glasses have a diameter of 50mm.
Humidity Chambers: Place over moist paper or gel in petri dishes to create a humid microenvironment for plant seeds or cell cultures.
Optical Experiments: Due to their high clarity and polished edges, these glasses can serve as a medium in optical refraction and reflection experiments, or to simulate lens effects.
Fire-polished edges reduce the risk of cuts or injury during handling, which is critical in busy lab settings.
Use as a temporary shield over chemical reactions or delicate samples to prevent dust contamination.
The fire-polished finish makes them more resilient to moderate temperature changes, making them suitable for low-temperature thermal conductivity experiments or observing crystallization patterns.
⚠️ Proposition 65 Warning for California Residents:
WARNING: This product may expose you to chemicals including styrene and/or bisphenol A (BPA), which are known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
WHY GSC GO SCIENCE CRAZY ?

Power Up Your Science Experiments
Explore circuits, current, and magnetism with easy-to-use, reliable tools.
Shop NowFrequently Asked Questions
Shipping
Yes! We offer fast, free shipping on eligible orders within the United States.
Most orders are processed within 1–2 business days. Delivery typically takes 3–7 business days, depending on your location.
At this time, we primarily ship within the United States. For international orders, please contact our support team for assistance.
Product
Yes. Our labware and science kits are specifically designed for educational use and are trusted by schools, teachers, and homeschooling families.
Most of our kits include easy-to-follow instructions or experiment guides. If you need additional help, our support team is happy to assist.
We carry a wide range of science education tools across multiple disciplines, including:
- Labware
- Electricity and Magnetism
- Force and Motion
- Light and Sound
- Properties of Matter
- Biology
- Chemistry
- Earth Science
- Novelty Items
Our products are designed with education and safety in mind. Adult supervision is recommended for younger users, especially during experiments.
Other
We’ve been supporting science education for over 60 years, providing reliable labware and hands-on learning tools.
We accept all major credit cards and secure payment options such as Shopify Payments, PayPal, and more.
Yes! We offer a satisfaction guarantee. If you’re not fully happy with your purchase, we make returns easy.
Our friendly support team is always ready to help. Reach out via our Contact Us page or email for expert assistance.