All shutters open louvered cathedral top with center rail and 15" wide . Durable copolymer construction with paintable surface. Designed with a deep wood grain texture for the appearance of wood shutters without the maintenance worries of wood. Installation fast and easy in any material: Wood, aluminum, vinyl, stucco, hardboard, or brick. Clean with mild detergent, then hose off. Requires a drill with 1/4" masonry bit. 8 Shutter-Lok fasteners included for installation. Limited lifetime warranty.