Round ceiling pans are manufactured from durable pre-galvanized steel and are designed to house and protect electrical wiring and to support light fixtures. All steel boxes are UL listed and acceptable for use in 2-hour fire rated walls and ceilings. 8-32 cover mounting screws are assembled. 1/2 in. depthDrawn with Conduit KO'sRACO® Ceiling Pans are used in the installation of ceiling or wall lighting fixtures