GR Universal Type Conduit Outlet Box, Explosion-Proof, Dust-Ignitionproof, Aluminum, Unilet, GRUE Hub Type. Includes: Externally Threaded Aluminum Surface Cover with 3.38 Inch Opening, (3) Close-up Plugs and (5) 1 Inch Threaded Universal Openings. For use with Threaded Metal Conduit.
