UNILETS® GRJS universal conduit outlet box with cover, explosionproof and dust-ignitionproof. Provides great resistance to corrosion, impact and shock. Accurately tapped, tapered hub threads for tight, rigid joints and ground continuity. Furnished with covers. General purpose wiring. Universal design with five threaded openings and three close up plugs. Compact round box for use where space is limited. Serve as mounting means for lighting fixtures when used with hub cover.