Fdc Deep Depth 1-Gang Cast Device Box | Circuit Protection | Control Circuits Lighting Ballasts Meter Circuits Electronic Circuits | For Reducing Conduit Entries to a Smaller Size in Threaded Rigid and Imc Conduit Systems | For Use With Conduit | For Use With Threaded Metal Conduit and Imc | Meter Socket | Use Through Knockout to Connect Box to Conduit Coupling, Use With Locknut to Connect Two Boxes Side by Side | Used With Locknut to Terminate Rigid and Imc Conduit to an Enclosure, Provides a Smooth Pulling SurfaceFurbay Electric Supp