Let backyard play time continue with PetSafe solid copper 16-gauge wire. Use the 500 feet of solid copper wire to expand your dog or cat’s current play area up to 1/3 acre, repair a wire break or to set up a new in-ground Fence boundary. This thick, long-lasting wire works with any PetSafe in-ground Fence system. Trust PetSafe® to keep your pet healthy, safe and happy. Features 16-gauge solid copper wire is thick and durable to increase the life of your in-ground fence and keep your best friend safe inside your yard Expand your pet’s current play area up to 1/3 acre or repair a wire break This 16-gauge solid copper wire works with any PetSafe in-ground fence system