For use when Flex Insight Desk is to be configured for all-in-one monitor or thin-client use. (CPU sling will not be needed.) One required for single desks, two required for double desks. To adapt the desk to all-in-one monitor, or thin-client use, each CPU sling and bracket must be removed and optional 38978 cover plate installed over each shroud opening. Note: The standard shipped desk configuration is ready for use with monitor(s) and CPU tower(s). CPU sling(s) and bracket(s) are factory-installed.