This a corner cage -it has a V-shape design for that purpose. There are no exposed nuts, all nuts are embedded in cage body so birds can not take apart cages. All-welded construction that prevents water from getting into metal tubes and rusting from inside-out. Cups are lock down-birds can not take cups out; they can only be removed from outside cage by swing open door and removing cup. Pet Focus cleaner and sanitizer is best for cage maintenance and parrot hygiene. Perfect size for Macaws and Cockatoos, African Grey and other medium sized parrots. Five-sided cage that has two 40 inch sides and three sides that are 22 inches.