Extra Fine Semi-Flex Fountain Pen Nib
A beautiful extra fine fountain pen nib with flex! This nib strikes the perfect balance between our Pro Flex and classic fountain pen nibs, offering a smooth writing experience with minimal upkeep. With gentle pressure, it elegantly flexes from 0.5mm to 1.5mm, allowing for expressive line variation.
Made exclusively for our fountain pens, all nibs are tipped with hard-wearing iridium for effortlessly smooth writing. You can choose between uncoated stainless steel (a sleek silver finish) or 14k gold plating (a classic gold finish) – the difference is purely aesthetic, so both options offer the same exceptional performance. Plus, every nib is interchangeable, allowing you to effortlessly switch styles whenever inspiration strikes.
Introducing Our Limited-Edition Ebonite Feed
Looking for a little something extra for your writing setup? Enter the Ebonite Feed. Unlike our injection-moulded feeds, ebonite is a game-changer for ink flow. Its natural hydrophilic properties (think super ink-grabbing powers) mean it holds more ink, giving you a smoother, wetter writing experience that’s perfect for those who like their pens to glide across the page.
This limited-run feed is part of an experimental release – we’ve sourced just a small batch to see what you think. If you’re all about peak performance, this might just be your new favourite upgrade.
Why Choose Ebonite?
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Ink-holding champion – More ink means fewer interruptions.
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Perfect flow – Balanced, smooth, and consistent writing.
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Made for the curious – If you’re ready to explore the next level of nib performance, this is for you.
Stock is limited (really limited), so grab yours while you can. And if we sell out, be sure to hit that 'Notify Me' button.
Customer Reviews
I had recently purchased an ef fountain nib that wasn’t working quite right. I reached out to customer service to troubleshoot - which was super helpful. After troubleshooting what I may be doing wrong (let’s be honest, sometimes it is this newby) the CS team sent a new one out immediately and it works great. I’m super pleased and will continue to be a big fan of TS!
Love this smooth-writing nib. Its a daiky writer for me!
Originally I bought this nib primarily to stop the ink from leaking out of my Studio Fountain Pen while its Pro Flex nib was taking a much needed bath. I was pleased to find that its use extended far from being a plug, lending itself quite nicely to every day pen use - shopping lists, notes to the milk man etc.
As mentioned in the description, this is a nib that takes some breaking in - like a pair of new Doc Martens, you have to put up with a little pain before it becomes comfortable and has a chance to shine. It’s called Semi Flex, and in the first few days of use it might be more accurately be described as Barely Flex - you need to lean on it quite hard to get any line variation (but not too hard or you’ll f’up the tines). Fill a few pages though and it’ll soon begin to loosen up, like a debutante on their sixth martini – soon enough the lines will start to splay more freely.
I had no real expectations of this nib, but now, having broken it in, it has become a pleasure to use, both for writing and sketching - the Pro Flex can sit in its bath a little longer…
I have bought both versions of the extra fine semi flex. Both are superb giving brilliant variation in line quality, but the ebonite version allows the ink to flow more smoothly and consistently. It really is worth paying the extra for this - it is a really game changer.
I just purchased the Extra Fine Semi-Flex Fountain Pen Nib with the Ebonite feed and I love it! It writes really well...not temperamental at all. I do need to press a bit when wanting thicker lines, but I'm fine with that. I'll be using this for artwork....doodle shown gives a good idea of line variation. I'm happy! :)
