Twist On Wire Connector, Color Blue, For Conductor Material Copper, Maximum Operating Temperature 221 Degrees F, Maximum Voltage 600 V, Minimum Wire Combination (3) 12 AWG, Maximum Wire Combination (2) 6 AWG, Contact Material Steel, UL 94 Flammability Rating V-2, Maximum Conductors 6, Standards CSA Certified, UL Listed, Wire Connector Style Wing, Insulation Material Polypropylene, Maximum Single Wire Size 6 AWG, Minimum Single Wire Size 14 AWG, Overall Height 1.55 in, Overall Width 0.79 in