Material: Electro-tin plated seamless copper Wire Range: 350 kcmil down to 3/0 AWG (flex compatible) Barrel Type: Standard/short barrel with a sight window and chamfered entry Voltage Rating: Up to 35 kV (proper insulation required below/above thresholds)Die Index: ILD-71 (Red color-coded)Certifications: UL 467 listed, CSA certified (600V to 35kV)