Dual Range Lug Two 250 MCM - 1/0 AWG, Four 250 MCM - 1/0 AWG - 1 Count Dual Range Lugs are set screw connectors that will accept either one or two wires. Made of 6061T-6 aluminum alloy. Electro-pin plated for low contact resistance. For use with copper or aluminum conductors. Rated 600 Volts (2000V max. per UL486B). UL 486A/B Listed. Temperature rating 90 degrees C.