Coupling, Trade Size: 3-1/2 IN, Outside Diameter: 4.88 IN, Length: 5-1/4 IN, Flexibility: Rigid And IMC, Material: Malleable Iron, Connection: Compression, Standard: UL 514B, UL File Number E11853, NEMA FB-1, For Joining Lengths Of Steel EMT To Rigid Metal Conduit Or IMC