Dual Rated Turn Prevent Lug 2/0-14 AWG with 1/4 Inch bolt size: Dual Rated Turn Prevent Lugs are made of 6061T-6 aluminum alloy. Electro-tin plated for low contact resistance. For use with both copper and aluminum conductors. Rated 600V (2000V max. per UL486B). UL 486A/B Listed. Temperature Rating 90 degrees C.