Button Style Photocell | Control Circuits Lighting General Loads | Dusk to Dawn Lighting Control | For Reducing Conduit Entries to a Smaller Size in Threaded Rigid and Imc Conduit Systems | For Use With Threaded Metal Conduit and Imc | To Connect Threaded Metal Conduit to a Threadless Opening in a Box or Enclosure | 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