Nylon insulated ring terminals provide superior insulation versus vinyl ring terminals. Insulation is securely molded and is flared for easier wire insertion. Allows for excellent mechanical crimp and wire strain relief. Works best when the terminal is double crimped - once on the wire, and a second time on the insulation of the wire. Industry standard color-coding indicates wire range. Rated to 600 volts and 221°F (105°C). Manufactured in the U.S.A.