Fss Shallow Depth 1-Gang Cast Device Box | Designed to Compensate for Length Changes Due to Temperature Variations in Exposed Conduit Runs | For Use With 1 1/2 In. Deep Channels | For Use With Carflex Conduit and Carflex X-Flex Conduit | For Use With Threaded Metal Conduit and Imc | For Use With Threaded Rigid Metal Conduit and Imc | Lighting Loads/ Branch Circuit Loads | Used With Locknut to Terminate Rigid and Imc Conduit to an Enclosure, Provides a Smooth Pulling SurfaceFurbay Electric Supp