This Therma-Tru Fiber-Classic prehung exterior door measures 36" W x 80" H and features a classic 6-panel insulated fiberglass construction in white. It arrives prehung with frame included and is pre-bored for a standard knob and deadbolt — ready to install right out of the box. Therma-Tru is the #1 brand of fiberglass entry doors in the U.S., and this model delivers top-tier energy performance with a U-Factor of 0.16, Solar Heat Gain Coefficient of 0.01, Visible Transmittance of 0.00, and Air Leakage of ≤0.3 — all NFRC and ENERGY STAR certified. Fiberglass construction resists warping, cracking, rotting, and rusting for long-lasting durability. Includes composite or wood jambs. New and never installed.