Aluminum Mechanical Lug, 1 Hole, Vertical 2 Barrel, No. 6 American Wire Gauge (AWG) - 300 kcmil, 3/8 Inch (9.5 mm) Stud, Dual barrel provides termination of two conductors, Made from high strength, extruded aluminium alloy to provide premium electrical and mechanical performance, Tin-plated to inhibit corrosion, Inspection window to visually assure full conductor insertion, Plated steel or aluminum set screw provides high strength, durable electrical contact between conductor and connector, UL Listed and CSA Certified for use up to 600 Volts and UL temperature rated 90 Degrees Celsius.