Twist-On Wire Connectors, Color Blue, For Conductor Material Copper, Maximum Operating Temperature 221 Degrees F, Maximum Voltage 600 V, Minimum Wire Combination (6) 14 AWG, Maximum Wire Combination (3) 8 AWG, Contact Material Steel, Standards UL Listed, Wire Connector Style Wing, Compatible with Product Type Solid or Stranded Wire, Insulation Material Polypropylene, Maximum Single Wire Size 6 AWG, Minimum Single Wire Size 14 AWG