Steel metallic round cover with a 1/2 In. knockout in its center. It is designed to house and protect electrical wiring, switches, and receptacles. It conveniently closes 3-1/2 In. octagon boxes when used as junction boxes. Additionally, this cover is UL listed for safety. This product can expose you to chemicals including lead, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov. Este producto puede exponerlo a productos qumicos, incluido el plomo, que el estado de California reconoce como causante de cncer. Para obtener ms informacin, visite www.P65Warnings.ca.gov. -