UNILETS® GRUE universal conduit outlet box for use in CEC governed locations with explosionproof, dust-ignitionproof. Accurately tapped, tapered hub threads for tight, rigid joints and ground continuity. Furnished with covers. General purpose wiring. Universal design with ¿ve threaded universal hubs and three close-up plugs. Smooth, rounded integral bushing in each hub type box protects conductor insulation.