Ergonomic and space-saving - convert any desk into a standing desk, ideal for alternating between standing work or sitting throughout the working day. Enhance posture - desk risers allow the choice of your optimum working height allowing you to always be in control of your back positioning. Smooth and stable - pneumatic lift functionality powered by a high-quality gas strut with a load capacity of 15kgs. Dual-level design - this riser has a two-level structure giving room for monitors or laptops and a lower space for keyboards and mice. Dellonda Size: 50.5cm H x 72cm W x 41.5cm D