ANCOR supplies a full line of nylon insulated, tinned copper terminals for the highest quality electrical system. ANCOR Marine Grade™ terminals differ from "automotive" terminals by being designed specifically for the harsh marine environment. Our nylon insulators are easy to crimp and will not split. Our barrels are designed to tightly grip the wire with the least effort. Our tinned copper gives the least electrical resistance but the most corrosion protection. Premium nylon insulator will not crack or split Deep serrations in barrel grip wire to exceed UL specifications Highest Grade electrolytic copper, tin plated for greatest corrosion resistance and least power loss Insulation grip connectors have an additional brass sleeve that provides a funnel entry for easiest installation and insulation grip Best for vibration, flexing and extreme environmental conditions US Made - UL listed