Ceiling Medallions: Made of virtually indestructible high-density urethaneRenovator's Supply's medallions are cast from steel molds making them the highest quality on the market. Steel molds provide a higher quality result for pattern consistency, design clarity & overall strength & durability. Lightweight they are easily installed with no special skills. Unlike plaster or wood urethane is resistant to cracking, warping or peeling. Factory-primed these medallions are ready for finishing. This medallion measures 16 1/2" and it has no center hole.