All Wood Arches are custom-made based on your arch opening measurements. So this is the perfect choice for eyebrow arch shaped windows. This product is inoperable -- the slats cannot be tilted. If this function is needed, choose the BioArch instead. The Custom Wood Arch is constructed from MDF, a durable engineered wood product that is resistant to warping, cracking, and breakage. It is available as a "Sunburst Arch", a "Slatburst Arch", and a "Blackout Arch". Sun ... (see Description Tab below)