Parker Quink - Medium Navigator vs Ultra Fine Navigator - Roller Ball Refill

Two types of refills are available for Parker roller ball pens but the difference isn't much. Check out.
Links
amzn.to/2ZyrK4x
amzn.to/3bRoFkN
My Unboxing channel
UnBoX NatioN - / unboxnation
*Note : These are affiliate links. As an Amazon Associate I earn from qualifying purchases. Affiliate links help me make a small comission when someone makes a qualifying purchase using the link. Thank you.