Set the perfect height when sitting or standing. Pneumatic control lift-assist height-adjustable table base. No electricity needed. Durable base recommended for up to 100-lb. lift capacity including weight of worksurface. Movement within a 13″ range from 26 3/8″ to 39 5/8″. Accommodates most common worksurfaces ranging from 59″ to 72″ width; and 24″ to 30″ depth. Strong black powder coated steel frame with cross bars provides stability and prevents racking. Adjustable leveling glides to compensate for uneven floors.