Nylon Insulated and heavy duty, resists vibration and moisture. Tin plated copper for corrosion resistance and superior conductivity. Deep internal serrations promote firm wire grip for maximum tensile strength. Connectors are colour coded for gauge identification. Can easily be crimped without damaging the connector. Nylon insulation provides superior insulation to vinyl. Insulation is securely moulded and is flared for easier insertion. Allows for excellent mechanical crimp and wire strain relief.