The term container means a single rigid, non-disposable dry cargo, insulated, temperature controlled flatrack, vehicle rack portable liquid tank, or open top container without wheels or bogies attached, having not less than 350 cubic feet capacity, having a closure or permanently hinged door that allows ready access to the cargo (closure or permanently hinged door not applicable to flatrack vehicle rack or portable liquid tank). All types of containers will have constructions, fittings and fastenings able to withstand without permanent distortion, all the stresses that may be applied in normal service use of continuous transportation. All containers must bear manufacturer's specifications. For Air Cargo, many types of air cargo containers are offered: The containers are designed in various sizes and irregular shapes to conform to the inside dimensions of a specific aircraft. For ocean cargo, containers are designed to be moved inland on its own chassis and can be loaded at the shippers plant for shipment overseas. Basic types of containers are; dry van, open top, half high, hi cube, flat rock, tank container, refrigerated container, insulated container, tilting container. Average outside dimensions are generally 20, 35, and 40 feet in length, 8 feet wide and 8 feet high standard