Twist-On Wire Connectors, Color Yellow, For Conductor Material Copper, Maximum Temperature 221 Degrees F, Maximum Voltage 600 V, Minimum Wire Combination (2) 18 AWG, Maximum Wire Combination (3) 12 AWG, Contact Finish Zinc, Contact Material Steel, UL 94 Flammability Rating V-2, Maximum Conductors 4, Standards CSA Certified, UL Listed, Wire Connector Style Wing, Fill Material Not Applicable, Insulation Material Polypropylene, Maximum Single Wire Size 10 AWG, Minimum Single Wire Size 14 AWG. This item has been restricted from sale in the following state (s): []