Ring Lugs: Terminal Type - Standard Ring; Insulation - Nylon; Stud Size - 5/16"; Conductor Min - 22 AWG; Conductor Max - 16 AWG; Color - Red; Temperature Rating - 105 deg C 221 deg F; Voltage Rating - 300V; Additional Information - Insulation Diameter: 0.140", Material: Copper, Finish: Tin