The HPE 686749-001-RFB is a refurbished front system fan assembly for cooling PCI boards in a server. It is identified as part 686749-001 and listed for 4U server installations, where it provides airflow around the PCI board area.
The assembly measures 80 × 80 × 38 mm. Its format and PCI-board purpose make it a specific server replacement part rather than a general-purpose case fan.
The package includes the fan, a blue retainer carrier and a cable assembly, as specified by HPE PartSurfer.