16-14 AWG Nylon Double Crimp Butt Connectors - 100 PackAncor's Marine Grade terminals differ from automotive terminals by being designed for the 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.. Nylon insulated with insulation grip. Funnel entry. UL 486C. WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.