4 in. Square Extension Ring, Drawn, 1-1/2 in. Deep with Twelve 1/2 in. KO’s
•Extension rings provide additional cubic capicity.
•May be used an an outlet box for surface conduit.
•Constructed from 1/16 in. pre-galvanized steel.
•Combination screw heads allow quick installation
•Drawn construction
•Twelve 1/2 in. knockouts
•UL Listed
•22.5 cu. in. capacity