eXtreme Dog Fence Brand Perimeter Wire - 18 Gauge | 2500' Continuous | Thick Polyethylene JacketYour dog's well being is paramount, so when it comes to the safety of such a beloved member of the family, -invest in a reliable, well constructed, top quality boundary wire for your static correction electric dog fence. You may save a few dollars if you chose a cheaply made PVC covered wire, but when it breaks down in a few years, you will find yourself spending more time and money digging up that wire to locate and fix/replace the degraded material that renders your fence useless.Don't fall into that cycle. Your dog is too important. Instead, invest in a high quality wire provided by the world's foremost experts on dog fence wire. All the wire you see on this listing is covered in polyethylene (PE), not PVC. Our low density polyethylene protective jacket is superior to PVC in many respects, such as: PE's temperature range is -55° to +600°c, PVC's is only -10° to +60°c PE is 30% lighter than PVC PE is more moisture resistant than PVC PE's insulation resistance is 50,000 Meg-Ohms/1000'. PVC's is 200 Meg-Ohms/1000'. This means much better electrical protection PE has higher chemical resistance PE has stronger abrasion and cut-through resistance PE has a better elongation resistanceOur wire is proudly made in the United States. We pride ourselves on providing a top quality wire for the benefit and safety of your family pet.