Item Copper clamps, 190A Indoor, 225A Outdoor, End Connectors Ferrules Both Ends, Grounding Clamps, Hole Diameter 0.27 in, Material Bronze, Overall Length 18 in, Grounding Braid Width 22/25 in, Hole Center to End 1.3 in, Number of Holes 1, Standards NEMA FB-1, UL467, Tongue Length 1 61/100 in, Tongue Style Standard, Tongue Thickness 0.47 in, Tongue Width 63/100 in, Weight 4 gauge