Powerfields EW315-660  Durable UV Treated Premium 3 Wire Polywire, 660-Feet , White Higher visibility for livestock than steel or other colored poly fencing materials Stainless steel conductors will not deteriorate or lose conductivity over time Solid UV treated high quality monofilament will not break down like coated poly fencing products For use with low impedance fence chargers only MADE IN THE USA with a 5 Year manufacturer's Warranty