GSC's Ball and Ring Apparatus is a visible demonstration of the expansion of metals. When the ball or ring is heated, the ball will not pass through the ring. When cooled, however, the ball passes through the ring freely. The ball and ring are mounted on an insulated handle. Instructions included.
Sold in a pack of 10.
PRODUCT WARNINGS
WARNING: This product can expose you to chemicals including lead and nickel, 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.