TWSBI Diamond 580 Fountain Pen Nib Set - Premium Replacement Nibs for Smooth Writing - Perfect for Calligraphy, Journaling & Office Use

Spare Nib Sets for Diamond 580 fountain pen

Choice: EF, F, M, B, Stub1.1

Will fit the previous generation 540 and 530 fountain pens. 

Easy holder case for storage when not in use. 

Quick and Simple changes between nibs. No hassle. 

A quick no brainer guide in choosing nib sizes in an overly complicated fountain pen world:

If you write small, go with an EF
For the normal writer, F is the most popular
If you tend to lean on a bigger font, M will be perfect
B is for statements!! Sign a check in B, write a header in B, do some coloring/shading in B
Stub nibs are italic in writing style (have a special card or invitation to write?)