The Cabin Light Series Poly Round and Oval Accent Windows are manufactured with Molded Polyurethane inside and out.  Polyurethane is a closed cell foam that has the same density as white pine. Both the exterior and interior of the Cabin Light series have a deep embossed woodgrain texture and is ready for paint or stain. All windows feature a 5 light diamond pattern poly removable grille and have 2 glass options, Clear Insulated or Energy Efficient Low-E insulated.