Glass Lens Demonstration 2" dia, Set-6 in Wooden Box

Glass Lens Demonstration 2" dia, Set/6 in Wooden Box‚ 

For showing the most important types of lenses. 2" (50mm) diameter, optically true with ground glass edges. Includes one each of concave, convex, double concave, double convex, plano concave and plano convex lens arranged in a velvet lines wooden box.