Ring Terminals-Vinyl-Insulated Barrel. Quick and reliable crimp-type wire connections. Color-coded by wire gauge size. Rated at 600 Volt maximum. Temperature rating: 167 °F (75 °C). Solderless 1/2" Stud 4 AWG Vinyl-insulated barrel Rated at 600 Volt Max Temperature rating: 167 °F (75 °C) UL listed 4 pack. WARNING: This