120 volt green wire spool. E17 sockets. UL Recognized Components, tested for your safety. Use indoors and outdoor for hanging lights. Compatible with both LED and traditional incandescent bulbs. Zip plugs can be added to spliced wires allowing for custom designed runs. Plugs sold separately for stringers and spools over 120'. Indoor / Outdoor use. Features Maximum watts per run: 672. Equivalent to 134 5 watt bulbs. Heavy duty SPT1 insulated wire is designed for 5 or 7 amp capacity SPT1 wire provides 10 amp capacity Commercial grade 18 gauge wire UL recognized components, engineered for safety UL recognized components, engineered for safety Use indoors and outdoor for hanging lights Compatible with both LED and traditional incandescent bulbs If one light goes out, the others stay lit Zip plugs can be added to spliced wires allowing for custom designed runs Specifications 500 feetGreen Spool with 12 inch spacing between 500 sockets 7 amp capacity Male plug only, no female end connector 12" lead