ShelterLogic Peak Style Port, 1-3/8-Inch 6-Rib Frame, 12-Feet &times;20-Feet &times;8-Feet, Grey Polyethylene Imported Heavy-duty 2 in. all-steel frame is bonded with a DuPont baked thermo-set powder-coat process for strength Heavy-duty 2 in. all-steel frame is bonded with a DuPont baked thermo-set powder-coat process for strength^Triple-layer, chemically heat-bonded, rip-stop polyethylene cover is waterproof for lasting protectionHigh profile white interior provides enhanced illumination^