Twist-On Wire Connectors, Color Blue/Gray, For Conductor Material Copper, Maximum Temperature 221 Degrees F, Maximum Voltage 600 V, Minimum Wire Combination (1) 20 AWG with (1) 18 AWG, Maximum Wire Combination (3) 10 AWG, Contact Finish Zinc, Contact Material Steel, UL 94 Flammability Rating V-2, Maximum Conductors 5, Standards CE, CSA Certified, UL 486G, UL Listed, Wire Connector Style Wing, Fill Material Silicone, Insulation Material Thermoplastic Polyester, Maximum Single Wire Size 10 AWG. This item has been restricted from sale in the following state (s): []