The Nib Engineering That Changes Everything
Two years of R&D.
Multiple manufacturers.
One goal: Create a flex nib that actually delivers on its promise.
Most flex nibs disappoint. We spent two years making sure ours wouldn't.
Designed in-house. Precision-engineered. Built for writers who know the difference.
What Sets XV Flex Pro Apart
Proprietary Stainless Steel Design — Drawn and engineered in our studio, not borrowed from existing designs.
Perfect Ink Flow — No railroading, hard starts, or flow interruptions.
Controlled Flex Response — 0.4mm to 2.0mm line variation with precise pressure control.
Premium Tipping Material — Smooth writing surface that maintains its performance over time.
"Not exaggerating when I say this is the absolute best nib I have ever used. The control and flexibility are simply unmatched."
— Jenifer Brown, Verified Customer
The Two-Year Journey
Creating the XV Flex Pro wasn't simple.
We went through multiple manufacturers before finding one that could meet our exacting standards.
Every curve, every feed channel, every flex point was tested and refined.
This isn't a modified existing design.
It's a ground-up engineering project that took us from concept sketches to a nib that performs exactly as intended.
Perfect For Discerning Writers
Daily Correspondence: Smooth enough for extended writing sessions.
Expressive Writing: Controlled flex for emphasis and flourishes.
Collection Quality: A nib that earns its place among your finest pens.
Reliable Performance: Consistent results, session after session.
Regular G Nib vs XV Flex Pro Nib
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Regular G Nib
- Designed for calligraphy and artistic lettering.
- Provides dramatic line variation with firm pressure.
- Best suited for decorative writing projects.
- Requires calligraphy technique for optimal results.
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XV Flex Pro
- Engineered for everyday writing with flex capability.
- Smooth, effortless strokes from first touch.
- Gentle pressure creates beautiful line variation.
- Perfect for daily journaling, letters, and casual flex writing.
Real Reviews From Real Writers
Choose Your Setup
For the nib-only product:
"Perfect if you already have a fountain pen that fits #6 nibs."
For the complete sets:
"Includes XV Flex Pro Nib + our premium pen body. Ready to write straight out of the box."
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XV Flex Pro Nib Set
Regular price From £19.00Regular priceUnit price per -
XV Flex Pro Nib + StoneGraph Fountain Pen
Regular price £46.00Regular priceUnit price per£76.00Sale price £46.00Sale -
XV Flex Pro Nib + Batavia Fountain Pen
Regular price From £69.00Regular priceUnit price per£91.00Sale price From £69.00Sale
About Our Pen Bodies
We know some of you have noticed our pen body design. Yes, we partnered with an established manufacturer for the housing - and we did it deliberately.
Here's why: We chose to invest our time, resources, and expertise in perfecting the nib rather than reinventing the pen body. The result is a writing instrument where every component works in harmony, but the star is the nib engineering that took us two years to perfect.
For collectors with preferred housings: The XV Flex Pro fits #6 nib systems.
For those who want everything optimized together: Our complete sets include custom grip sections and barrel connections designed specifically for the XV Flex Pro's performance characteristics.
Engineered for the Writing Connoisseur
Where innovation meets tradition.
Our proprietary Flex Pro technology offers remarkable line variation from an extra-fine 0.4mm to an impressive 2.0mm with minimal pressure. The premium tipping material ensures buttery-smooth writing while our specialized design provides the perfect resistance for controlled flourishes and expressive lettering.
