Spare Nib Sets for Diamond Mini fountain pen

Comes in: EF, F, M, B, Stub1.1 

Easy change: simply unscrew and screw on a new one

Easy holder case for storage when not in use

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?)