The Slipfence HORIZONTAL Fence system was specifically designed to provide the strength and endurance of Aluminum with the low maintenance of Composite material. By combining 3” Square Aluminum Fence posts and two custom designed  left and right Aluminum “U” Channels with regular size 5/4 Deck boards (Actually 1” thick) that slip easily down the channels attached to the Aluminum Fence Posts, 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.  For added appeal just attach the Slipfence Horizontal Cap Rail onto the top of the finished panel for a nice, clean, finished, look on the top of your fence panels.