These exhibits are properties owned by an outside vendor (either the show general contractor, or an outside rental exhibit company), which are stock properties that are rented to the exhibitor in a standard configuration, or a modified version thereof. Rental exhibits use these stock properties to provide a basic structure for the exhibitor, which can then be augmented by custom graphics, easily applied and removed finishes, and other cosmetic augmentation. Inventory rentals normally require the services of an on site labour source (show general contractor, or a labor contractor approved through show management) to set up, and often the rental exhibit provider can provided those services as part of the rental package to the exhibitor.