Patt Grooved Panels is a kind of product which the grooves are on visible side and the round holes are on the rear,their core materials are medium density fiberboard(MDF),they can be used for wall and ceiling finish. Thickness 15mm General Size Panels Width 128mm 2440?28mm Patt Grooved panels have different kinds of facing, melamine and veneer. They also have fire-resistant and not fire-resistant.