The Feather River Door Company Preston 36 in. x 80 in. Smooth White Ready to Paint Prehung Left-Hand Inswing Patina Full Lite Fiberglass Door provides energy efficiency and helps to prevent infiltration by the elements with its triple-pane insulated glass, polyurethane foam core and compression weather strip. This door adds style to your home thanks to a smooth, paint-ready surface and a contemporary, geometric glass design with patina caming. Every Feather River Door is loaded with standard features which are usually upgrades with other doors and are Energy Efficient and Energy Star Qualified. Door Spec: 36 in. x 80 in. Prehung Door, 4-9/16 in. Primed Jamb, Left Hand Inswing, Fits Rough Opening of 38-1/4 in. x 82-1/8 in.