Manufactured with Ancor's premium UL1426 tin copper battery cable. Flame retardant, UV inhibited, rated to 600V and 105-Degree Celsius. Lugs are tin copper to avoid corrosion and last longer. Each end has a piece of Ancor's adhesive lined 3: 1 heat shrink tubing placed over the electrical connection. The heat shrink tubing seals out moisture and other corrosive elements found in the marine environment. Product selection, quality, and service are the pillars of the brand. Ancor is your single source for wire and accessores.