VTF4 Panel Height: 4U Space Features: -Fine perforated pattern limits viewing for aesthetics.-Flanged for extra strength.-22pct open area design. Construction: -Heavy-duty 16-gauge steel construction. Color/Finish: -Black powder coat finish. Dimensions: -1U Rackspace - 1.75" H.-2U Rackspace - 3.5" H.-3U Rackspace - 5.25" H.-4U Rackspace - 7" H.