Glass cover plates are often used to cover flasks in the lab. This option is 4.5" x 4.5" in size and has an approximate thickness of 2.5mm. They also have ground edges for a smooth finish.
WARNING: This product can expose you to chemicals 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.