Grounding Busbar, Material Copper, Description/Special Features Busbar Pre-assembled with Brackets and Insulators, For Use With Grounding & Bonding, Grounding Bar Holes and Size (24) 1/4 in, (6) 3/8 in, Grounding Bar Length 20 in, Grounding Bar Thickness 1/4 in, Grounding Bar Width 4 in, Ground Wire Included No, Includes Panduit GB4B0624TPI-1 Main Grounding Busbar, Standards BICSI/TIA-607-C, cULus