Louisville Aluminum Framed Attic Ladder offers an R5 insulated door with weather stripping factory installed providing more energy efficiency than a traditional attic ladder. Improved squareness and predrilled holes for ease of installation. Designed for attic openings of 25.5 in. x 63 in., fit ceiling heights from 10 ft to 12 ft. Gas piston system allows easier and smooth opening and closing door. This attic ladder has a working load capacity of 375 lbs.