LineArt Custom Decorative Grooved Panels from Richelieu Hardware have a core made from a 5/8-in. thick black MDF panel. The core is then covered with any one of the company’s high-pressure laminates, wood veneer, or metal sheet. Choose from available laminates for a completely custom look to match any design. Grooves are machined up to 1/4-in. deep to maintain the structural integrity of the panel. The grooves and slats can be customized in any pattern ranging in widths from 1/16 in. to 1 in.