Our standard thistle tubes have a stem that is 7mm in diameter and are made of borosilicate glass. This tube has a stem that is 400mm long.
Sold as a pack of 5
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 .
Our products are not toys. Use in a laboratory or educational setting only. Not for children 13 and under.