Twist-On Wire Connectors, Color Gray, For Conductor Material Copper, Maximum Operating Temperature 221 Degrees F, Maximum Voltage 300 V, Minimum Wire Combination (3) 22 AWG, Maximum Wire Combination (2) 16 AWG, Contact Finish Zinc, Contact Material Steel, UL 94 Flammability Rating V-2, Maximum Conductors 5, Standards CSA Certified, UL Listed, Wire Connector Style Standard, Fill Material Not Applicable, Insulation Material Polypropylene, Maximum Single Wire Size 14 AWG. This item has been restricted from sale in the following state (s): []