CONDUIT, PIPE, FITTINGS | Acoustical, Ceiling and Partitioning, Electrical | Control and Motor | For Adapting Non-Metallic Conduits to Threaded Fittings, Metallic Systems | For Through Terminations Where Large Devices or Additional Wiring Capacity Is Required | For Use With Carflex Conduit and Carflex X-Flex Conduit | Use Through Knockout to Connect Box to Conduit Coupling, Use With Locknut to Connect Two Boxes Side by Side