Appleton Conduit Outlet Box, Type GRL, (2) 3/4" Hubs, Aluminum

GR Type Conduit Outlet Box, Explosion-Proof, Dust-Ignitionproof, Aluminum Iron, Unilet, GRL Hub Type. Includes: Internal Ground Screw and O-Ring, Internally Threaded Surface Cover with 3.38 Inch Opening, 18.0 Cubic Inches and (2) 3/4 Inch Threaded Hubs. For Use with Threaded Metal Conduit.