Question 2016 ASUS gl502vs cooling fan replacement

[Randy99]

Hi all!
I have an old (2016) Asus ROG Gl502vs laptop. I'm looking to get replacement cooling fans for it, but hit an unexpected issue. Amazon has many products, but some made mention of differing sizes, i.e. 9 vs 14. How do I determine which is correct for my stock unit? Nothing I saw in the manual/online info seemed to give me any help...Thanks in advance!

 

[punkncat]

Measuring tape or calipers?

 

[Randy99]

Measuring tape or calipers?

no....just visual

 

[punkncat]

If you open the laptop and access the fans do they have a model number or any identifying markings you can use to cross reference?