To stabilize 180" to 240" highheavy duty cantilever rackslaterally, install this component between the uprights. *Please note, the number of X-braces included in the set may differ from the product image. See details below for the quantity. For use with 15', 16', 18', 20'h heavy duty uprights Bolts between uprights to maintain rigidity of rack 24" to 84" sets include 1 X-brace 96" and 120" set include 2 X-braces Need heavy duty cantilever racking? BrowseHERE.