Halex 91631 Water-Tight Conduit HUBS, 1/2", Silver 1/2-inch's long To UL and CSA requirements Indoors or outdoor use Features flame retardant insulated throat and is rain, oil and dust tight; oversize locknut assures vibration-proof install and positive grounding 10 Pieces per box Water tight conduit hub Die cast Use to connect Rigid or IMC conduit to a load center or other metal enclosure where a water tight joint is required at knockouts or slip fit holes Made from zinc 1/2-Inch