Ancor 4 Gauge Marine Tinned Copper Heavy Duty Butt Connectors ANCOR Marine Grade lugs are manufactured from heavy duty annealed tinned copper, providing for maximum current flow. 100 tin plated copper resists corrosion from salt and moisture. Seamless barrel design allows for maximum strength when crimped. Closed end design seals out moisture so cables stay dry and corrosion free. California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details Google Product Type Con