Large Demonstration Prism Set, 1 Each

The Large Demonstration Prism Set by United Scientific is an oversized set of six magnetic-backed lenses and prisms, about 8 inches long, for mounting on a magnetic chalk or marker board. It includes semi-circular, convex and concave lenses, an equilateral prism, an activity guide and a wooden storage case. Physics teachers use it for whole-class optics demonstrations; a ray box is not included.