Our WALKAroo™ 6430 with non-tilting work surface has a pneumatic lift for height adjustability. Includes our Ergo work surface in three wood grain options, Cord Access Portal, A/C adapter bracket and drawer. Five extra large 4" heavy duty casters on 24" diameter base keep unit stable and balanced. Two locking and three non-locking. Details Features pneumatic lift for height adjustability, 5 extra large 4" heavy duty casters -2 locking and 3 non-locking. Dimensions Work surface is 17-11/16" W x 25-3/16" D Base has 24" diameter footprint