This is our best selling dog fence kit! Our 4' poly dog fencing is made from a tough polypropylene material that creates the ideal dog barrier for puppies and small dogs that will not chew or challenge the fence line. This easy-to-install 4' x 100' fence for dogs requires little maintenance. Thanks to the 1.75" x 1.97" black fence mesh, this virtually invisible plastic dog fence becomes "hidden" from approximately 20 feet away; so the fence won't appear obtrusive and block views. With a certified breaking load of 650 pounds, this heavy duty 4' plastic dog fence will last between 10-15 years.