This double-convex glass lens is made of polished optical glass. It measures 75mm in diameter and has a focal length of 20cm.
Sold in a pack of 10 lenses.
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.