The JL cover wall box conversion kit changes a standard FL-500P and FL-600P box bottom into a high capacity wall box. This is perfect for consealing a large number of power and A/V or data jacks in a convenient wall box with locking cover. The JL cover is shipped with a high gloss white paint. This cover will work with either the standard 4" or 6" FL-500P and FL-600P box bottoms.