Cubic feet
Cubic feet are imperial units of volume. A cubic foot is defined as the volume of a cube with sides one foot in length. It is normally found in the United States for measuring the volume of household items, inner spaces or parcels.
US oil barrels
A US oil barrel, also known as a petroleum barrel, is a volume unit used in the oil and gas industry to measure crude oil or liquid petroleum gas (LPG). One US oil barrel is 42 US gallons or about 159 liters.