Convert an existing fence or wall into a cat fence simply and affordably. Attach our extenders to any structure over 5' to provide your cats with instant freedom. Our strong poly fencing is stretched between the extenders and attached with zip ties. Secure the lower portion of the poly fencing to your existing fence to give your pets the saftey and exercise they deserve. This kit comes with everything that you need to convert 100 ft of fence. Patent Pending. Kit Includes: 4' X 100' Poly Fence Material 12 Overhang Extenders 100 8" Heavy Duty Zip Ties Hardware and Clamps for Installation Complete Detailed Installation Instructions