I don't know but it's a very good pen . Premium quality

UNI-BALL Air UBA188M 0.5mm Roller Ball Pen | Waterproof Bold Ink | Water & Fade Resistant | Long Lasting Smudge Free Ink | School and Office stationery | Black Ink, Pack of 4

UNI-BALL Air UBA188M 0.5mm Roller Ball Pen | Waterproof Bold Ink | Water & Fade Resistant | Long Lasting Smudge Free Ink | School and Office stationery | Black Ink, Pack of 4

Q: what's the difference between these and Uniball eye? are they thicker or thinner? Are they waterproof?

In both pens ink is water proof (as the reviews are given by various users). Ub 188M comes with 0.5mm Ball and Ub eye 157 comes with 0.7mm ball, Ub eye 150 comes with 0.5 mm ball. Both the pens are smooth on paper.

Q: Is the font of the pen bold?

yes... its bold. as if more than 0.7 even though it's 0.6.

Product ID: 85421243

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Details

Brand
uni-ball
Writing instrument form
Roller Ball
Colour
Black
Ink Colour
Black
Age Range (Description)
Adult

⏳Long-lasting, smudge-free writing

💧Waterproof & fade resistant ink

🖊️0.5mm micro tip for precision

Frequently Bought Together

Uniball Air Micro Pen, Set of 4 - Black (UBA 188 M)

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Description

🖋️ Write Boldly, Last Endlessly – Because Your Ideas Deserve the Best

PRECISION IN EVERY STROKE - Micro 0.5mm tip delivers crisp, clean lines for professional note-taking and detailed work.
EFFORTLESS COMFORT CONTROL - Advanced grip design reduces hand fatigue during long writing sessions, perfect for meetings or journaling.
SMOOTH FLOW NO INTERRUPTIONS - Innovative acetal plastic-encased metal ball guarantees consistent ink flow until the last drop.
INK THAT STANDS THE TEST OF TIME - Waterproof and fade-resistant ink ensures your important documents stay flawless and legible.
PACK OF 4 FOR EVERYDAY EXCELLENCE - Stay prepared with a sleek set of four black ink pens, ideal for office, school, or creative projects.

The UNI-BALL Air UBA188M is a premium 0.5mm micro roller ball pen featuring waterproof, fade-resistant black ink that delivers smooth, smudge-free writing. Engineered with a unique acetal plastic-encased metal ball for consistent ink flow, this pack of four pens combines precision, durability, and comfort—perfect for professionals and creatives who demand reliability in every stroke.

Specifications

Manufacturer	MITSUBISHI PENCIL CO., Mitsubishi Pencil Co. Shingawa, Tokyo, Japan
Brand	uni-ball
Model Number	UNP188MBK4
Colour	Black
Closure	Cap
Grip Type	Advance
Material	Plastic
Number of Items	4
Size	1 count (Pack of 4)
Point Type	Micro
Line Size	0.5mm
Ink Colour	Black
Manufacturer Part Number	UNP188MBK4
Manufacturer	MITSUBISHI PENCIL CO.
Country of Origin	Japan
Imported By	Linc Pens & Plastics Ltd. 3, Alipore Road, Kolkata 700027

Have a Question? See What Others Asked

Is this refillable

what's the difference between these and Uniball eye? are they thicker or thinner? Are they waterproof?

Is the font of the pen bold?

is it 1mm

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