OZ-Gedney Type GH Swivel Ground Hub, Conductor Size: 4/0 AWG - 500 KCMIL, Length: 1-7/8 IN, Size: 1-1/4 IN, Cast Bronze, Screws: Brass, 2-11/16 IN Height, Dimension B: 2-1/2 IN, Dimension D: 3/8 IN, Third Party Certification: UL File Number E24264, Applicable Third Party Standards: UL 467, Federal Specification W-F-406E, For Use With Universal Ground Clamps To Connect Grounding Conductors Run Bare, In Armor Or In Conduit