The HBL500/HBL750 Series Armored Cable Connector is used for connecting 14/2 14/3 12/2 and 12/3 MC and Armored Cable to Hubbell Fittings. A Short Piece of HBL500IV/HBL750IV Raceway must be used between this Connector and the Hubbell Fitting. Not for connection to (12.7) Flex Conduit.