4-11/16 in. W Galv. Steel Gray Flat Square Cover with 1/2 in. KO in Center, 1-Pack

Manufactured from durable pre-galvanized steel and are designed to house and protect electrical wiring, switches and receptacles. All steel covers are UL listed and acceptable for use in 2-hour fire rated walls and ceilings. Device mounting holes are pre-tapped to accept device fasteners.”,”highlights”:[“Use to mount a pair of devices to a 4″ square box”,”Heavy-duty, zinc-plated, thick pre-galvanized steel”,”Slotted mounting holes for easy installation”