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The Raco 4 inch Square Extension is 1-1/2 inch deep. It features 1/2-inch side knockouts.
- Extension Ring
- 1-1/2 in. Deep
- Drawn with Conduit KO's
- RACO Extension rings provide a means for adding cubic capacity or as an outlet box for surface conduit
- 22.5 cubic inches
- 1-1/2" deep
