Extreme Dog Fence 18 Gauge Boundary Wire - Multiple Lengths in Continuous Spools SPECS: This Option is for a Single Conductor 1000 Foot Continuous Spool of 18 Gauge Wire, with a Polyethylene Jacket and Solid Copper Core. Highly Resistent to Moisture, Chemicals, Abrasion, Cut-Through, and Elongation. UNIVERSAL: Any of the Spools of Fence Wire on this Listing will Work with Any Inground Pet Fence Manufactured by PetSafe , Innotek , Perimeter Technologies , Dogtra , DOGTEK , Invisible Fence Brand , SportDOG , High Tech Pet , Pet Stop , or DogWatch. They Can Serve as Standard Dog Fence Boundary Wire, or Have 2 Lengths Combined to Create Your Fence's Twisted Wire. This is an Excellent Choice if You Want Your Underground Dog Fence to Last and Last. THE GOOD STUFF: This Wire is Not the Same Grade Wire you Will Find at a Building Supply Store or Depot. This Wire is Polyethylene Covered, Direct Ground Burial Rated and Resistent to the Sun's Rays. It is Designed to Perform out in the Elements and Provide Years of Solid Reliability. Most of Our Wire Will Last Longer than the Life of Your Beloved Pet. VERSATILE: These Single Conductor, Solid Copper Core Wire Spools are NOT Limited to Use on Your Inground Dog Fence Systems, but Can Also be Used in Sprinkler or Irrigation Applications, Low Voltage Lighting, Tracer Wire, and any THHN or THWN Scenario. MADE IN U.S.A.: All of eXtreme Dog Fence Brand Wire is Manufactured in America, So You Know You Can Rely on its Peformance for Years Beyond the Cheap Stuff that is Typically Packaged with Factory Underground Dog Fence Kits.