Positions the monitor at a comfortable viewing height. Durable plastic base doubles as paper storage shelf. Adjustable to five different heights: 64-165mm, by attaching the appropriate number of stackable column sections. Supports up to a 21in CRT or TFT monitor or 36kg in weight. WxDxH: 334x340x64-165mm. Computer Supplies#StandsGBPBB91717