Gardner Bender 21-109 Electrical Ring Terminal, 12-10 AWG, Insulated Barrel, Crimp Connection, 7 Pk, Yellow Stud Size: 7/16 inch to  inch INDUSTRY STANDARD Color-coded by wire gauge size QUICK and RELIABLE crimp-type wire connectors UL Listed with both Canadian and U.S. requirements Rated: 600V Max and 167F (75C)