Heavy Duty Lugs - 4/0 Gauge Wire - 1/2" Post - 2-PackCable Gauge: 4/0Screw Size: 1/2"ANCOR Marine Grade™; lugs are manufactured from heavy duty annealed tinned copper, providing for maximum current flow100% tin plated copper resists corrosion from salt and moistureSeamless barrel design allows for maximum strength when crimpedClosed end design seals out moisture so cables stay dry and corrosion freeWARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings. ca.gov.