The Stand Up Desk Store Clamp-On Adjustable Height Desk Shelf Monitor Stand reduces clutter on your standing desk while placing your monitors at a comfortable height. Features include easy, tool-free attachment to the rear edge of your desk and adjustable height for personalized ergonomics. Available in 30", 48", and 60" widths as well as a 120-degree version. 60 lb. weight capacity. Made of powder-coated steel. 5-year limited warranty against defects. Stand Up Desk Store is based in the suburbs of Chicago.