Ancor 4 Gauge Premium Marine Battery Cable - Black Ancor Marine Grade Standard Battery Cable Assemblies are manufactured with Ancors premium UL1426 tinned copper battery cable. The battery cable is fine stranded to produce maximum conductivity and flexibility. In addition, all Ancor battery cables are flame retardant, UV inhibited, and rated to 600V and 105C. The lugs are tinned copper to avoid corrosion and last longer. Each end has a piece of Ancors adhesive lined 31 heatshrink tubing placed o