Twist-On Wire Connectors, Color Yellow, For Conductor Material Copper, Maximum Temperature 221 Degrees F, Maximum Voltage 600 V, Minimum Wire Combination (3) 20 AWG, Maximum Wire Combination (3) 12 AWG, Contact Finish Zinc, Contact Material Steel, UL 94 Flammability Rating V-2, Maximum Conductors 6, Standards CE, CSA Certified, UL Listed, Wire Connector Style Wing, Fill Material Not Applicable, Insulation Material Nylon, Maximum Single Wire Size Not Applicable. This item has been restricted from sale in the following state (s): []