OZ-Gedney Type IBC-LS-AC Insulated Grounding Bushing With Lug, Size: 4 IN, Malleable Iron Body, Aluminum Lug, Steel Clamping Screw And Set Screws, Finish: Zinc Plated Body, Tin Plated Lug, Zinc Plated Clamping Screw And Set Screws, Connection: Set-Screw, 150 DEG C, 6 - 250 MCM Grounding Wire, 5-3/16 IN Outside Diameter, 1-1/16 IN Width, 3-13/16 IN Turning Radius With Lug, Third Party Certification: UL File Number E-24264, CSA 009795, Applicable Third Party Standards: UL 467, CSA C22.2 No.41, Federal Specification W-F-408E, NEMA : FB-1, For Rigid Conduit And IMC