CONDUIT, PIPE, FITTINGS | Designed to Compensate for Length Changes Due to Temperature Variations in Exposed Conduit Runs | For Adapting Non-Metallic Conduits to Boxes, Threaded Fittings, Metallic Systems | For Reducing Conduit Entries to a Smaller Size in Threaded Rigid and Imc Conduit Systems | For Use With Schedule 40 and 80 Pvc | 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 Surface