Extension Ring, 2 Gangs, Galvanized Steel, 1-1/2 in D, 4 in W, 4 in L

4 in. Square Extension Ring, Drawn, 1-1/2 in. Deep, Eight 1/2 in. and Four 3/4 in. KO’s•Extension rings provide additional cubic capicity. •May be used an an outlet box fro surface conduit. •Constructed from 1/16 in. pre-galvanized steel.•Combination screw heads allow quick installation•Drawn construction•Eight 1/2 in. knockouts and four 3/4 in. knockouts•UL Listed•22.5 cu. in. capacity