Twist On Wire Connector, Color Black, For Conductor Material Copper, Maximum Operating Temperature 302 Degrees F, Maximum Voltage 600 V, Minimum Wire Combination (1) 18 AWG with (1) 20 AWG, Maximum Wire Combination (2) 14 AWG, Contact Material Steel, UL 94 Flammability Rating V-2, Maximum Conductors 5, Standards CSA Certified, UL Listed, Wire Connector Style Standard, Compatible with Product Type High Temperature, Insulation Material PBT, Maximum Single Wire Size 14 AWG