Dark Grey Metal Multifunction Mobile Stand-Up Computer Desk WorkstationThis Multifunction Mobile Stand Up Computer Desk Work Station combines simple design, solid construction, and multiple surfaces to deliver a cost effective solution for office and classroom presentation needs. A bottom shelf with 19. 75" of clearance offers ample space for PC towers and the height adjustable second shelf serves as a keyboard tray whether you're sitting or standing. When its time to store or use the cart elsewhere, 4 rolling casters