WingGrip connectors or wire splices with industry standard colour coding for wire sizes 18 AWG to 6 AWG. The twist-on splices have square-wire spring threads which provide a positive grip, moulded 'wings' to enable a secure connection. Made from UL 94V-2 flame retardant thermoplastic with a maximum operating temperature of 105°C. The maximum voltage rating for these WingGrip splices is 600 V for building wiring and 1000 V maximum in light fixtures, luminaries and signs. For use with copper to copper connections only.