Build your own cord to your desired specifications with this special zipcord. This standard insulated, two conductor green cord has a rib on one conductor for polarity indication. It is a 1000 foot spool made of 18 gauge copper wire and PVC insulation material. Please note that this spool is the wiring only. Plugs and sockets sold separately. UL listed for indoor and outdoor use, and CSA approved. Additional specifications: 18 AWG SPT-1 Stranding: 41 strands/ 34 gauge Insulation Thickness: 0.030 Working Voltage: 300V AC Temperature Range: 105 degrees C Size: Nominal O.D.: 0.104 x 0.210