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 Emt Conduit | For Use With Rigid/imc Conduits | For Use With Threaded Metal Conduit and Imc | Use Through Knockout to Connect Box to Conduit Coupling, Use With Locknut to Connect Two Boxes Side by SideFurbay Electric Supp