Uni ballpoint refill Jetstream 0.28 mm (1 pcs)
The Jetstream refill by Mitsubishi Uni in 0.28 mm is one of the finest oil-based ballpoint pen refills available – developed for the Jetstream Edge. The low-viscosity oil-based ink glides across paper with noticeably less friction resistance than conventional ballpoint inks and leaves a sharp, vivid line at just 0.28 mm stroke width. Document-proof, water-resistant and light-resistant: a refill you can trust with signatures and archival notes.
Highlights
- 0.28 mm stroke width: Enables very fine handwriting, tight line spacing and detailed margin notes – even on small-format paper, the handwriting remains legible and clear.
- Oil-based ink with low viscosity: The ink flows evenly and without smudging, dries quickly and doesn't clump – for a smooth, consistent writing feel over long distances.
- Document-proof, water-resistant, light-resistant: The dried ink won't dissolve from moisture and won't fade under light exposure – suitable for contracts, forms and long-term archival documents.
- Available in black, blue and red: Three classic office colours for clear colour coding in notes, corrections or appointment calendars.
- Model SXR-203-28: Precisely designed as a replacement refill for the Jetstream Edge.
Application & Tips
- Calendars and planners: The 0.28 mm line fits even into tight day columns and small boxes – ideal for bullet journal layouts with lots of content in little space.
- Margin notes on smooth paper: On smooth, calendered paper, the oil-based refill shows its strengths most clearly: even ink flow, no line fraying.
- Signatures and forms: Water and light-resistant ink makes the refill a safe choice for legally relevant documents.
- Colour coding: Black for running text, red for corrections and markings, blue for secondary levels – all three variants are available as individual refills and can be combined as needed.
- Writing pressure: The low viscosity makes heavy pressure unnecessary – a light, relaxed grip is enough for a vivid line.
For Fine-Line Enthusiasts
The SXR-203-28 is one of the few oil-based ballpoint pen refills that actually achieves a stroke width of 0.28 mm – a range where almost exclusively fineliners or gel pens operate. The combination of oil-based ink and this fineness requires a precisely manufactured ball and an exactly balanced ink formula: if too thin, the ink would run; if too thick, it would tear. The result is a refill that produces lines on smooth paper that visually resemble fineliners – with the longevity and smudge resistance of an oil-based refill.
Technical Data
| Model: | SXR-203-28 |
| Colour (this variant): | Black |
| Available colours: | Black, Blue, Red |
| Stroke width: | 0.28 mm |
| Ink type: | Oil-based |
| Document-proof: | Yes – water-resistant and light-resistant |
| Compatibility: | Jetstream Edge |
| Origin: | Japan |
