Part numbers To review a list of part numbers for customer-replaceable units (CRUs) and field-replaceable  units (FRUs), click  Actions  Part Numbers . CRUs can be replaced by IBM clients; FRUs  are replaced by IBM Support or an IBM Service Partner. The part numbers that are available for the IBM FlashSystem 900 are shown in Figure 7-39. For Full list of CRUs and FRUs see IBM Knowledge Center  Flash System 900 Reference  CRU and FRU list  The information that is shown in Figure 7-40 on page 212 can be displayed in the Properties  window by selecting  Actions  Properties . Properties menu Figure 7-39 List of part numbers  Chapter 7. Using IBM FlashSystem 900  211