If anyone needs HDU, please call Coastal Enterprises. 800-845-0745 We are a manufacturer off high density urethane and we have a major breakthrough, Precision Board Plus. The material's new tighter, finer cell structure, makes it far easier to carve, prime and paint. We have composed our new Precision Board Plus out of special eco-friendly components, including state-of-the-art 'green urethane' formulations. Our products are made in the USA and we have a written "Life of the Sign" warranty. We have quick turn around times and a full technical support department available to help at any time. Please call us at 800-845-0745 to learn more and help meet the needs of your signage business!