This aluminium 3” X 3”post carries Solar panel, Battery box and Gate opener’s control box. It is like one complete power supply unit. Post is powder coated black, 2.2M long (enough to go into the ground). Centre of the top angle plate where the solar panel goes to, has a hole to run the wires through. Battery box and Gate motor controllers box go on the side plate. Price given here is for one unit only.