Ring Extension Stl 4in 22.5cu
For adding additional cubic capacity or as an outlet box for surface conduit. Twelve 1/2" side knockouts, drawn metal, suitable for use in 2-hour fire rated walls. 4" square x 1-1/2" deep, 22.5 cubic inch capacity. UL Listed.
- SQUARE EXTENSION RINGS
- Size In=4
- STEEL
- DRAWN CONSTRUCTION
