These are extra, vertical, 19-inch, rack-mounting profiles to provide intermediate mounting points in addition to the front and rear profiles supplied as standard with Lande ES362 Series cabinets.
They attach to slots in the front-to back rails. They have two sets of perforations to take cage nuts, to fix equipment both in the open faces of the rack and accessories, such as shelves and chassis guides, inside the rack. 1U increments on each front face and are screen-printed with 'U' height measurements to aid installation. They are made from 1.5mm steel with 8 - 12 micron zinc plating. Supplied as a pair.