Heavy Duty Lug 1 GA Wire 3/8" Post *100 Pack BulkAncor Marine Grade lugs are manufactured from 100 percent heavy-duty annealed tinned copper, providing for maximum current flow while resisting 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.Features:. 100% Tinned Copper. UL 486A. WARNING: 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.