EMT Or Rigid To FMC Transition Coupling 4″ To 4″, Steel
https://hotfix.nsiindustries.com/product/emt-or-rigid-to-fmc-transition-coupling-4-to-4-steel/
The Bridgeport 4″ To 4″ Combination EMT Or Rigid To FMC Transition Coupling joins 4″ EMT or rigid to 4″ flexible metal conduit. The hinged strap and set screw ensure a proper electrical connection.