The Luxor PS3945 Adjustable Height Computer Workstation is capable to adjust in height from 3ft to 4ft. It comes with 3 shelves such as top shelf (2ft W x 1ft D), middle shelf (2ft W x 1ft D) and bottom shelf (18 3/4in W x 15 3/4in D). This is perfect for desktop or laptop computers. It also has black powder coat painted steel frame and wood laminate work surfaces. When it comes to mobility, this cart uses 3" casters (two are with locking brake).