Bayer Built Steel Entrance Systems offer a wide range of steel exterior doors. The 24-gauge steel provides superior impact resistance and rust protection. Select Steel Series doors carry a 15 year limited warranty and many are Energy Star rated. The Bayer Built series feature a ployurethane foam core for thermal protection and formed steel edge construction for rigidity, security, and fire protection. Additionally, the prefinished white steel doors are available with an adjustable hinge plate.