Quality replacement fuses for Christmas Lights, generally larger C7, C9 and G40 Christmas Lights, Patio String Light Replacement fuses, Halloween or Holiday Lights and many Holiday Inflatables. Also used in other electronics of various sizes. Size: 0.2 x 0.78 inch / 5 x 20mm glass tube, 125V , 8 amp breaking current. These fuses protect electrical equipment and other devices from over-current.