A 80 mm Watch Glass (China) is a common, cost-effective laboratory staple made from soda-lime or borosilicate glass. While “Pyrex” is often the go-to for high-heat applications, Chinese-manufactured watch glasses are the standard for general-purpose school, university, and industrial labs due to their durability and low cost.

Key Specifications

• Diameter: 80 mm (approximately 3.15 inches).

• Shape: Concave (curved) surface with a fire-polished rim to prevent chipping and ensure safe handling.

• Material: Usually thick-walled glass, resistant to most acids and alkalis at room temperature.