What refill can I use?

You can use Jetstream Edge refills or Jetstream Multi refills. I don’t buy them on Amazon. Not sure if I can say this but I buy them from Tokyo Pen Shop online

How do I replace the ink pens

Pull from the grip down, without twisting to expose the cartridges, then pull the cartridge you want to replace out.

How can I get the .38mm refills for this and will they fit in this pen?

Uni SXR-80-38 fits this pen and is in the 0.38mm size (hence the “38” at the end).

Is there a way to tell which tip you are selecting?

only if the refill is the .28 - the .38 & .5 refills look alike but write differently

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Jetstream EDGE 0.38mm Oil-based Ballpoint Pen, Black Red Body (SXN100338BK15)

Product ID: 298855317

Details

Age Range (Description)
Adult
Brand
uni
Color
Black Red Blue
Ink Color
Black
Writing Instrument Form
Ballpoint Pen

♻️Refillable design for sustainability

⚙️Hybrid oil-based ink for smooth, fast writing

🖊️0.38mm ultra-fine tip for precision

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517029₫

Duties & taxes included

In stock

Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🖋️ Write sharp, write smooth — own the edge in every word.

BUILT TO ENDURE - Durable construction survives everyday bumps and drops, ensuring your pen stays as sharp as your ideas.
SUSTAINABLY SMART - Refillable cartridges (SXR-203-28) keep you eco-conscious while maintaining premium performance.
EFFORTLESS SMOOTHNESS - Hybrid oil-based Jetstream ink glides with minimal friction, perfect for marathon writing sessions or rapid note-taking.
SLEEK STYLISH DESIGN - Modern black-red body with a metal grip and clip combines professional aesthetics with ergonomic comfort.
PRECISION IN EVERY STROKE - Ultra-fine 0.38mm ballpoint tip delivers crisp, legible writing that stands out in meetings and notes.

The Uni Jetstream EDGE 0.38mm ballpoint pen features an ultra-fine tip paired with hybrid oil-based ink for smooth, precise writing. Its refillable design and durable metal grip make it a stylish, sustainable choice for professionals seeking both performance and elegance in their everyday writing tools.

Specifications

ASIN	B08WPQ9NZQ
Additional Features	Refillable
Age Range Description	Adult
Best Sellers Rank	#5,183 in Office Products ( See Top 100 in Office Products ) #135 in Ballpoint Pens
Body Shape	Round
Brand Name	uni
Color	Black,Red Blue
Customer Reviews	4.4 4.4 out of 5 stars (2,192)
Drill Point	Ultra Fine
Grip Type	Knurled
Hand Orientation	Ambidextrous
Included Components	Ink Cartridge
Ink Base	Hybrid
Ink Color	Black
Item Diameter	11 Millimeters
Item Dimensions	0.47 x 0.43 x 5.63 inches
Line Size	0.38 Millimeters
Manufacturer	Uni
Model Name	ジェットストリームエッジ
Model Number	SXN100338BK15
Recommended Uses For Product	Coloring,Writing
Unit Count	1.0 Count
Writing Instrument Form	Ballpoint Pen

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