The small area end systems for 4' dog fence are used to terminate your dog fence at your house or other structure. The corner post is 1 5/8" vinyl coated steel braced by a 1 3/8" support post. Includes all hardware and written installation instructions. Makes 2 separate end systems. Small area end systems are designed to be used on small backyard enclosures of 100 feet or less. For larger areas, use the Heavy Duty End System for 4' dog Fence.