Product Features Ancors Marine Grade terminals differ from automotive terminals by being designed for harsh marine environment Nylon insulators are easy to crimp and will not split Barrels are designed to tightly grip the wire with the least effort Tinned copper gives the least electrical resistance but the most corrosion protection .250 6.4 mm Tab Size UL 310 Nylon Insulated with Insulation Grip Double Crimp, Funnel Entry California Residents WARNING Cancer and Reproductive Harm - P65Warnings.c