1/2 Lite Iron Fiberglass Door CollectionReplace your front door with this gorgeous new 1 2 lite iron 1 3 1 fiberglass prehung door in dark walnut! This prefinished fiberglass door is 1 3 4 thick and wont warp, rot, dent or split. This door is equipped with an energy saving, insulating, foam polyurethane core that reduces sound transfer. Hung in a composite 4 9 16 door jamb with a right hand inswing. Fully weather stripped and has low E insulated glass for energy efficiency! Get yours today