Spare Nib Sets for Diamond 580 fountain pen

Choice: EF, F, M, B, Stub1.1 mm or Stub 1.5 mm

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. 

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?