MMI Door Fiberglass Front Doors are built to last and can add substantial curb appeal to your home. This fiberglass smooth front door unit comes with our MSystem2 warranty on the door component and the base prehung system as well as a 10-year warranty on the glass lite. All of our fiberglass smooth front doors are virtually maintenance free and will not warp, rot, dent or split. Our prehung door unit (called the MSystem) seals out the weather and practically eliminates air and water infiltration all together. Common door size is 64 in. x 80 in. Unit dimension is 68.5 in. x 81.75 in. The suggested rough opening is 69 in. x 82.25 in. This unit comes with a 4-9/16 in. wide primed composite frame. Color: Brilliant White.