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3-1/2 inch round covers, 1/2 inch knockout.
Application: These round steel covers are used to mount over an outlet box to either blank-up an existing box or attach switches, receptacles and other wiring devices.
Construction: Galvanized steel; 0.0625 inches thick
Size: 3-1/2 inch round; flat, 1/2 inch knockout.
Certification: c-UL-us Listed
Product Features: