The versatility of Stone Stacks allows you to build a wall for any training level. Simulated Grey Stone or Brown Stone are made 6" high in both 10' and 12' lengths and have recessed holes which allow you to add flowers. Use a single set of Stone Stacks or add additional sets to build a wall in 6" increments to the height custom for your jump. Marry Stone Stacks with the Culvert and build an obstacle as high and demanding as you would like.