is the fine or the micro the larger line?

The fine point tip is larger than the micro point tip.

What's the difference from this pen and the uni-ball Onyx Stick Micro Point Roller Ball Pens, 12 Black Ink Pens(60040)?

In my experience the Onyx Smooth Write Rollerball (mico point- 60040) is very similar, with the Onyx producing a slightly darker black mark. This pen has more of a "precise" feel and I put that in quotes because you'd probably have to be real picky to notice a difference, and others might totally disagree! Both flow beautifully, seem to run out of ink at pretty much the same rate and are a pleasure to write with.

Is the micro the finest point in the Uniball style ?

The micro is the finest point using standard ink, but if you like gel ink there is an ultra micro with a .38mm point. You can find them on amazon as well. I have not used them, I like the .5mm point of the micro roller ball.

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uni-ball Roller

Product ID: 57766979

Details

Age range (description)
Teen Adult
Brand
uni-ball
Colour
Black
Ink colour
Black
Material
Metal
Model name
ROLLER

💧Water-resistant uni Super Ink

♻️Made from recycled materials

🖊️0.5mm micro point for precision

5356F

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Description

🖋️ Write sharp, write smart — the pen that means business.

COMFORT MEETS CONTROL - Soft grip and ambidextrous design provide fatigue-free writing for long meetings or creative sessions.
FADE FRAUD RESISTANT INK - uni Super Ink technology ensures your notes and signatures stay vibrant and secure against water and tampering.
ECO CONSCIOUS CRAFTSMANSHIP - Pens crafted from recycled materials, perfect for the mindful professional who values sustainability.
SILKY SMOOTH PRECISION GLIDE - Experience effortless, smudge-free writing with a micro 0.5mm tip that delivers crisp, clean lines every time.
VERSATILE EVERYDAY ESSENTIAL - Ideal for everything from detailed diagrams to signing important documents—your all-in-one writing companion.

The uni-ball Roller Pens feature a precise 0.5mm micro point tip and water-resistant uni Super Ink technology, delivering smooth, smudge-free writing. Made from recycled materials, these pens combine eco-friendly design with professional-grade performance, perfect for detailed note-taking, legal documents, and creative projects. Each pack includes 12 black rollerball pens with a comfortable soft grip and click-off cap for convenience.

Specifications

Age Range Description	Teen, Adult
Asin	B00006IE8P
Best Sellers Rank	90,195 in Stationery & Office Supplies (See Top 100 in Stationery & Office Supplies) 325 in Liquid Ink Rollerball Pens
Body Shape	Cylindrical
Brand Name	uni-ball
Closure Type	Click-Off Cap
Colour	Black
Customer Reviews	4.7 4.7 out of 5 stars (5,159) 4.7 out of 5 stars
Drill Point	micro point
Global Trade Identification Number	00070530601510, 50070530601515
Grip Type	Soft
Hardness	HB
Included Components	ART SUPPLIES
Ink Base	Water
Ink Colour	Black
Is The Product Left Or Right Handed	Ambidextrous
Item Diameter	0.5 Millimetres
Item Dimensions	8 x 13 x 193 millimetres
Item Weight	9 g
Line Size	0.5mm
Manufacturer	Uni-ball
Material Type	Metal
Model Name	ROLLER
Model Number	60151
Recommended Uses For Product	Writing
Special Features	Liquid Ink
Style	Black (12 Pens)
Unit Count	12.0 count
Upc	638084834251 999992900057 809302146849 799198337301 801593363578 800011406668 641438169237 823019777448 100012609243 030246601518 523160242887 070530601510 804993626571 806792164889
Water Resistance Level	Water Resistant
Writing Instrument Form	Roller Ball Pen
Writing Technique	rollerball

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5356F

Duties & taxes included

In stock

Sold byAmazon French PolynesiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to French Polynesia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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