Our borosilicate Watch Glasses have fire-polished edges and a concave shape. They have many uses in the lab, such as covering jars to prevent contamination, preventing direct contact with heat, acting as an evaporation surface, and more.
WARNING: This product can expose you to chemicals including arsenic, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Our products are not toys. Use in a laboratory or educational setting only. Not for children 13 and under.