Grounding Busbar Material Copper Description/Special Features Busbar Pre-assembled with Brackets and Insulators For Use With Service Entrance Grounding Grounding Bar Holes and Size (16) 1/4 in (16) 7/16 in Grounding Bar Length 16 in Grounding Bar Thickness 1/4 in Grounding Bar Width 4 in Ground Wire Included No Standards cULus Listed TIA-607 Compliant