Empty. 63mm felt nib. 80ml HDPE hard bottle.
This is the largest among "Big mops".
Alcohol-based inks are suitable.
! Caution!
Do not throw away this inner cap.
This is a very important part to prevent ink leakage.
This inner cap and the small hole are for adjusting the amount of ink.
If you want more ink to come out, enlarge the small hole.
