The upright is part of the free standing outdoor shelf and is made of galvanized steel. The uprights diameter is 2 cm, and the height is 87 cm, where the foot is adjustable. A complete section of the free standing shelf consists of one back panel, two uprights and two galvanized floor panels with height 85 cm and depth 30 cm. To build additional sections, you need one upright along with one panel for each section. We recommend at least one back panel, preferably placed in the middle, for a free standing shelf consisting of three sections.