This battery cable is fine stranded to produce maximum conductivity and flexibility. In addition, it is flame retarded, and UV inhibited. The lugs are tinned copper to avoid corrosion and to last longer, while each end has a piece of Ancor's adhesive lined 3:1 heatshrink tubing placed over the electrical connection. Sealing out moisture and other corrosive elements found in the marine environment. Providing you with a highly conductive, corrosion resistant, strain relief to ensure a longer lasting battery connection.