Twist On Wire Connector, Color Gray/Red, For Conductor Material Copper, Maximum Operating Temperature 221 Degrees F, Maximum Voltage 600 V, Minimum Wire Combination (3) 18 AWG, Maximum Wire Combination (2) 10 AWG with (1) 14 AWG, Contact Material Steel, UL 94 Flammability Rating V-2, Maximum Conductors 6, Standards CE, CSA Certified, UL Listed, Wire Connector Style Wing, Fill Material Silicone, Insulation Material Polyester, Maximum Single Wire Size 8 AWG