Fountain Pen Revolution makes two EF ultra flex nibs. This is the smaller one. Comes with an ebonite feed in a cheap FPR pen body.
I also have the larger of their ultra flex nibs, housed in an Asvine v126 with a plastic Asvine feed.
(Photos to come.)
Country:
United Kingdom
Availability check:
Available
Brand:
Other
Pen price (not rental value):
£50 - £100
Pen type:
Modern
Nib width:
EF: Extra Fine
Nib speciality:
Flex
Nib material:
Steel