Grounding Connector, Grounding Wire Size 6 AWG to 250 kcmil STR, 6 to 4/0 AWG SOL, Material Aluminum, Number of Wires - Grounding 1, Description/Special Features Hex Socket Steel Screw, For Maximum Ground Conductor Wire Size 250 kcmil, For Minimum Ground Conductor Wire Size 6 AWG, For Use With Aluminum Conductor, Conduit, Copper Conductor, Pipe, Water Pipe, Grounding Wires Connected To 1 1/4 in to 2 in Pipe, Standards UL Listed, UL467, Type - Grounding Connector Mechanical