Bridgeport Mighty-Rite® Insulated throat grounding split bushing is ideal for use on rigid and IMC conduits. It is suitable for use in situations where wires need to pull-through conduit or EMT fittings. This grounding split bushing of trade size 4-inches, features die-cast zinc construction for longer endurance. This low-profile bushing employs hinged design to easily adjust and align even in tight spots. It measures 3.87-Inch ID x 5-Inch OD. The adjustable aluminum alloy 6061-T6 grounding lug of this nylon-insulated grounding split bushing accepts conductors of size 6 - 3/0-AWG. Grounding split bushing is UL/cULus listed, NEMA FB-1 rated and RoHS compliant.