This super strong 5 x 5 steel center post with base bolts to the floor with the stationary base mounting hardware not included for stability. To hide all cables, the post includes 3 cable management openings at 15, 42-1/2 and 70H. Permits mounting of work surfaces at 30 or 40H. Permits mounting of monitors at 52, 66 or 80H. Post base measures 17-1/2 x 17-1/2. Powder coat finish.