The Series 400 doors are constructed from vinyl laminated galvanized steel. It is more resistant to dents and scratches. The steel is over sixty percent thicker than the steel one the Series 200 door. Series 400 doors are equipped with a heavy-duty aluminum frame ensuring stability as well as safety and security. Other features include a folded edge that blocks air, light, and water penetration, highly efficient polyurethane foam insulation with high R-Values, adjustable striker plates, and both the frame and the door are deadbolt prepped. The Series 400 door also features weather-stripping on the door frame and on the core creating a double seal. Options include a swivel lock bolt, a threshold, a drip cap, and a chain. Other additional hardware items such as a dead bolt and knocker viewer are also available upon request. All options, if not stocked, are available by special order.