The HPE ProLiant DL3X0 Gen11 1U High Performance Fan Kit, part number P48908-B21, is a fan option for the ProLiant DL3X0 Gen11 server family. Its purpose is to provide server cooling as part of the system’s fan configuration.
This is the 1U high-performance kit identified by HPE for that family. The listing confirms the product identity and intended server family; it does not specify the number of fans or further technical details.