The Boiling Flask has a 24/40 ground joint at the top of the flask. It is made with a uniform wall thickness and round bottom. The flask is labeled as 250ml and it has a white marking spot. The flask is made from Borosilicate glass which is resistant to breakage due to thermal shock from temperature changes.
WARNING: This product can expose you to chemicals including lead, 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.