The all space steel uprights offer easy customization for all organization solutions. Made of premium materials for heavy duty construction. A powered cost finish resists rust for years of use. -18.75 in. Steel upright -use with all space easy hang track -extends from easy hang track to accommodate shelves, all space steel pegboard and utility track -allows for easy customized organizational solutions -use to connect all space vertical standards (450036-03) to double or triple their length -attractive grey finish looks great in home, office or garage -heavy duty construction for secure holding power