This set of six 38mm lenses contains one of each of the following: a double convex lens, a plano-convex lens, a concavo- convex lens, a double concave lens, a plano-concave lens, and a convexo-concave lens. Use it to study optics and focal lengths.
WARNING: This product can expose you to chemicals including arsenic, 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.