Item Features: ---This is a new cooling fan. --- # Wires To Connector : 3 Compatible Model: --- ProBook 5310 5310M Compatible Part Numbers: --- 581088-001 583465-001 Package Includes: --- cooling fan --- Thermal Paste Note: Please check your Cooling Fan and compare it with our listing photo to ensure that this is the item you need. Please be informed that using your laptop model and fan part number is not sufficient basis to identify the correct replacement because they might have different appearance, screw alignment, pin connector and might not work at all series. It would be better to remove your current fan from your laptop and compare it with the picture contained within the listing. Also please be informed that our item are all sorted according to compatible laptop models. You will receive any of the part numbers mentioned above. All are compatible replacement. It can be used interchangeably. Photo is for reference only.