The HP N08721-001 CPU heatsink is a cooling component for the HP Z2 Mini G9 Workstation. Its part description specifies a 125 W CPU heatsink, identifying this version for a higher-rated processor cooling configuration.
HP Community lists N08721-001 as the heatsink option for an upgraded 14th-generation Intel processor in the Z2 Mini G9. It is a specific workstation service part, rather than a general-purpose desktop cooler, and is intended for that system’s CPU cooling assembly.