New Battery Cable Assembly ancor 189130 4 Gauge Black Length 18 Stud 5/16 : Are manufactured with Ancor s premium UL1426 tin copper battery cable. Flame retardant UV inhibited rated to 600V and 105 deg celsius. Lugs are tin copper to avoid corrosion and last longer. Each end has a piece of Ancor s adhesive lined 3:1 heatshrink tubing placed over the electrical connection. The heatshrink tubing seals out moisture and other corrosive elements found in the marine environment.