Wire Connector Body Material Aluminum Alloy Color Black Finish Insulated For Conductor Material Copper For Stranded Copper Wire Size - Minimum 4 AWG For Stranded Copper Wire Size - Maximum 3/0 AWG Head Style Hex Hex Size 3/16 in Insulation Material Plastisol Maximum Operating Temperature 194 Degrees F Maximum Voltage 600 V Number of Ports 3 RoHS Compliant Yes Standards UL 746C 750 Degrees C Glow Wire UL Listed 486A/B Wire Connector