This heavy duty gauge wire will last underground for many years to come. It stands up to the harshest underground conditions including, extreme cold, heat, and excessive moisture. The polyethylene jacket provides an extra layer of protection against the elements as well as protection against rot and decay. Our 16 AWG twisted dog fence wire is much easier to work with than the kit included twisted wire. The kit wire is very fine (20 gauge) and is not polyethylene coated. Over time, this thin wire will break down and be the cause of many hassles. Professional installers use this twisted wire to connect the perimeter dog fence wire to the transmitter. Twisted dog fence wire can also be used to connect inner loops to protect flower gardens, shrubs, children’s play areas and pools. This wire is compatible with all PetSafe, sportDOG and Innotek wired fence systems.