The CK #6 Stainless Steel Nib (JoWo) – Medium is a reliable, widely used replacement nib found in brands like Conklin and Monteverde. Manufactured by JoWo (Germany), it’s known for consistent quality and smooth writing performance across different pens that accept #6 nibs.
The medium (M) nib size provides a broader, wetter line compared to fine nibs, making writing feel smoother and more fluid. It’s a great middle-ground option—offering better ink shading and a more expressive line while still remaining practical for everyday writing, journaling, or signatures.
As a #6 nib, it’s one of the most common standard sizes in fountain pens and is compatible with many models that use JoWo #6 nibs. However, compatibility can depend on whether your pen uses just the nib or a full nib unit (with feed and housing), so it’s important to confirm before swapping.
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