Extreme Dog Fence Ultimate Pure Solid Copper Core Spool - 14 Gauge Electric Dog Fence Boundary Wire - Rugged 44 MIL Polyethylene Insulation for All in-Ground Pet Containment Systems 1000 Feet of 14 Gauge / .044 Polyethylene Protected, Pure Solid Copper Core Wire that is UV Resistant, Direct Ground Burial Rated and of the Highest Quality Available ANYWHERE! eXtreme Dog Fence Maximum Performance Wire is Compatible with ALL Brands of Electric Dog Fence, Including PetSafe, Perimeter Technologies, Invisible Fence, SportDOG, Dogtra, Pet Stop, and ALL Others The Highest, Most Durable Polyethylene Jacket Provides the Greatest Protection Against Heat, Cold, Water, Moisture, Abrasion, Chemicals, Elongation and Rodents Better than ANY Competitor's Wire American Made: eXtreme Dog Fence Brand Dog Fence Perimeter Wire is Proudly Manufactured in the USA. The Copper Core is Solid Copper Straight Through (Not Copper-Clad Aluminum) Additional Fence Parts: You Can Also Find Spools of Twisted Wire, Additional Dog Fence Collars, Batteries, Replacement Transmitters and Many Other Pet Related Products in Our Amazon Store It is the most difficult aspect of an underground dog fence to replace, as it is typically buried It is the one part of your fence that is constantly exposed to the elements (which can fluctuate regularly, and impact the wire&#039;s protective coating) A thinner fence wire adds more resistance to your electric dog fence&#039;s radio signal, potentially decreasing the maximum coverage area. Temperature eXtremes Water Chemicals Abrasion Elongation Rodents eXtreme Dog Fence Invisible Fence Perimeter Technologies Pet Stop SportDOG PetSafe DOGTEK Dogtra Innotek High Tech Pet And ALL Others