Wisewire Pet Fence Wire WW-G-P/20 Gauge/500' WiseWire 20 AWG is equal to copper in signal performance for pet containment systems. It simply outperforms copper wire in strength, reliability, and durability at a lower cost WiseWire 20 AWG is 5X higher in break load or equal to 14 AWG copper wire, minimizing damage during installation and while in service. Designed to embody the flexibility and memory of copper with a slightly stiffer feel. For use in opentrench and plow-in installation WiseWire 20 AWG provides excellent corrosion resistance and superior strength for unmatched tensile, side impact loads, and flex fatigue. RoHS compliant and works with connectors you already use WiseWire 20 AWG is eco-friendly. Protecting the Earth and going green is an important factor. All materials that go into this product are fully recyclable to avoid ending up in landfills. Material Wire