Brand Name: NSi Type: Aluminum Dual Range Lug Wire Size: (1) 600 MCM-4 AWG (2) 250 MCM-1/0 AWG Bolt Size: 9/16 Number Of Conductors: 2 Material: aluminum Application: Wire Termination Number Of Mounting Holes: 1 Color: Aluminum Finish: Aluminum Number Of Ports: 1 Voltage Rating: 600 V Standard: UL486B Temperature Rating: 90° C Environmental Conditions: 90 C Prop 65: California residents see Prop 65 info here