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 sma
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I bought this to switch out an EF that was extremely scratchy. ( Not sure if that is how is to be or if it had an issue) The F nib is very smooth, and with a more wet ink, the line isn't too thick. Changing it was very simple.
Elizabeth · August 1, 2026
So grateful I found a medium nib for my twsbi diamknd 580!
