Polyurethane Foam Boards are a unique fine-celled, high-density polyurethane foam intended for proofing NC/CNC machine programs, prototype models, and other modeling applications where a versatile, stable, grain-free stock material is desired. These foam boards are available in 12 lb., 15 lb., 20 lb., and 30 lb. densities, and provide a surface which produces excellent edge definition and also enhances paintability and finishing.