Swap your nib. Change your writing. This is the replacement nib unit for the smaller Opus 88 pen models that are fitted with a #10 JoWo nib unit (size #5 nib), including Fantasia, Koloro, Picnic and Mini Pocket. It is not compatible with larger Opus 88 models including Omar, Demo, Jazz, Shell, Flora, Bela or Flow. Who this is for You love your Opus 88, but want a different line width Your nib is damaged, scratchy, or inconsistent You want to experiment with custom grinding nibs You're a nib explorer and want to try this JoWo nib on a different pen What's included Complete unit with stainless steel nib, feed, and housing Screw-in fit with no tools required Uses the JoWo Size #5 nib Writing feel JoWo stainless steel nibs are known to be firm, wet and smooth. They have a generous slit gap and rounded tipping that provides for smooth writing, even with suboptimal pen angle or poor paper quality. Installation Unscrew your current nib unit from the grip section Screw in the new unit until finger tight Check the feed is exactly square on the nib Fill your pen and begin writing Practical tip When installing the nib unit, turn the barrel, rather than turning the nib. This helps prevent accidental twisting of the tines as you screw in the unit. When removing the original nib unit, take care not to lose the o-ring that sits at the back of the nib housing. FAQs Can I replace just the nib?Yes, but it requires more care. A full unit swap is faster and a less inky experience. Will this nib unit fit any pen that takes a JoWo #5 nib?Not necessarily. Whilst some pens use the same JoWo #5 nib, they may have a different nib unit and threading. You could try harvesting the nib from the Opus 88 unit and inserting it into the nib unit of the recipient pen. Is this better than tuning my existing nib?For damaged nibs or changing sizes, yes. For minor scratchiness, tuning may be sufficient. Is the nib pre-tuned?It is factory tuned, and usually reliable. You can request a free nib check in the Checkout comments if you prefer we do a quick check. Which size should I choose?Fine works well for most users. Medium offers a smoother feel. The stub is best for expressive writing and line variation. Fountain pens are modular tools. A simple nib swap can completely change how your pen writes and feels.
