The Reversible Stone Landscape Timber with Spike will retain the loose surfacing bordering your playground equipment and add style to your existing playground. These 8-inch high timbers allow landscaping and playgrounds to intertwine. One side has the appearance and feel of smooth river stones; the opposite side is similar to stacked fieldstone. Made of strong and durable HDPE with the color and texture of natural stone, each timber includes one 24″ timber stake. The dimensions of each timber are as follows: 8″ high x 5″ wide x 48″ long (center to center of the stake holes).