T-18Wire 50' Twisted Wire 18 Gauge Underground Dog Fence Boundary Wire
50 feet 18 Gauge Twisted Wire for Underground Dog Fence Containment Systems. The 18 Gauge Twisted Underground Dog Fence Wire is used to open up a section of the underground dog fence. Let’s say you have a perimeter around your back yard but want to open an area for the dog to walk through. That is when you switch to the twisted wire. When the wire is twisted the signal cancels itself out.