The Slipfence Vertical Fence system was specifically designed to provide the strength and endurance of Aluminum with the warmth and beauty of wood.By Combining 3” Square Aluminum Fence posts and two custom designed top and bottom rails or “ stringers" with regular size fence boards that slip easily in through the stringers and are available at most home improvement centres across North America, the result is a residential yard fence that has the warmth and privacy of a natural wood fence but the framework will not warp, crack, lean, nor rot. If and when the wood fence boards become weathered and require replacing they can easily be slipped out of the framework and new ones slipped in for a brand new looking fence without having to set new posts in Concrete.For added appeal just attach the Slipfence Aluminum Cap Rail onto the top of the finished panel for a nice, clean, finished, look on the top of your fence panels.