Kodak Slide Projector Condensers & Heat Glass - Set of 3Two glass condensers and one heat glass. Approximate measurements: small condenser 2 1 16 inches diameter (convex on both sides but one side only slightly), large condenser 2 3 4 inches diameter (convex on both sides), heat glass 2 1 2 inches diameter and 1 4 inch thick. Overall they are in good vintage condition with some light signs of use and a couple of very small chips to the edges.