The 18RA-6 is a Sta-Kon? RA series Ring Terminal, made of copper with electro-tin plated finish, 600V rated voltage. This ring terminal is self-insulated with PVC insulation sleeve of extra length to give protection and relieve bending stress. Brazed seam barrel is serrated to obtain high pull-out value. Insulated vinyl ring terminal for wire range from 22 to 16AWG.