1 - Ancor Lead Battery Terminal - 5/16" & 3/8" Stud - Positive & Negative Combo ANCOR Marine Grade&#153; lugs are manufactured from heavy duty annealed tinned brass, providing for maximum current flow 100% tin plated brass 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