This 11/16 x 2-1/2" primed MDF board is a reliable choice for clean, contemporary trim work. Made from premium medium-density fiberboard, it features a smooth S4S (Surfaced Four Sides) finish with E2E (Eased Two Edges) for a softened, professional look along the length of the board. The factory-applied primer saves time and effort, making it ideal for casing, chair rails, or custom decorative accents.