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🖊️ Write sharp, write smart — Uniball One, where precision meets style.
The Uniball One Gel Pen 12 Pack features ultra micro 0.38mm tips delivering precise, clean lines with quick-drying, smudge-resistant gel ink. Its ultra-vivid, fade-resistant black pigment ensures bold, lasting impressions. Designed with a sleek white barrel and anti-slip grip, plus color-coded clips for easy organization, these pens combine professional performance with minimalist style—perfect for millennial managers who demand both function and flair.




| ASIN | B09ZK13551 |
| Additional Features | Fade Resistant |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Best Sellers Rank | #552 in Office Products ( See Top 100 in Office Products ) #29 in Gel Ink Pens |
| Body Shape | Round |
| Brand | Uni-Ball |
| Brand Name | Uni-Ball |
| Closure Type | Retractable |
| Color | White |
| Customer Reviews | 4.5 out of 5 stars 1,388 Reviews |
| Drill Point | Ultra Micro |
| Grip Type | Ribbed |
| Hand Orientation | Ambidextrous |
| Hardness | HB |
| Included Components | 12 Gel Pens |
| Ink Base | Water |
| Ink Color | Black |
| Item Diameter | 0.41 millimeters |
| Item Dimensions | 5.5 x 0.41 x 0.61 inches |
| Item Weight | 9.07 g |
| Line Size | 0.38mm |
| Manufacturer | uni-ball |
| Material | Plastic |
| Material Type | Plastic |
| Model Name | uniball™ one |
| Model Number | 70392 |
| Pattern | Solid |
| Recommended Uses For Product | Writing |
| Style | 0.38 mm Ultra Micro |
| Theme | Cartoon |
| UPC | 030246703922 |
| Unit Count | 12 Count |
| Water Resistance Level | Water Resistant |
| Writing Instrument Form | Gel Pen |
| Writing Technique | gel ink |
V**A
Love love love
Perfect for note taking if you like these style of thin pens. Did smudge test and no ink smudged dried quick not a thick pen and easy to hold with out discomfort.
A**E
Especially great for marginal notations
On my third box now. Unequivocally my favourite writing instrument. Even beat out my Pilot G2 and Sharpie S-Gels of the same size/width. The colour is just bold enough, does not smear, and works well even with a pretty heavy hand. Also doesn’t dig into Wite-Out tape which is a godsend. I have one in all my bags and I try to replenish my stock when the price gets justifiably reasonable as far as pens go.
P**.
I’m coming back for more
These are my new favorite pens. I have very small handwriting, and these pens fill my need as a writer. Great ink flow, smooth feel, standard size for hand and a great value for the price point. I WILL PURCHASE AGAIN!!!
K**N
I love these pens!
I love these pens! real enjoyable experience to write with, from regular copy paper at work, to college classes when I use my campus grid for math and lined for other subjects. I also use them on different rhodia notebooks, and also John Neal copperplate graph pads, for learning Japanese, Korean, and practice my penman ship. Nice thin smooth, always consistent lines. My 3rd box that I buy, if I don't use up the ink I give them out so other people can try them.
C**L
Great pen, would recommended
Pretty great, There is no smudges and dries almost immediately (within 1 second) My highlight test shows that it passes within 1 second with no smudges This is because the amount of ink let out isn’t a lot so it doesn’t have time to clump up and smudge. I’d suggest this pen to everyone. Especially if you like a little bit of scratch on it.
J**A
precise writing!
this pens are really soft and they feel good in your hand. I love that the point is 0.38mm because my hand writing looks more elegant.
G**Y
GBB-0036 - Uni-ball One Gel Pen 0.38mm 12-Pack Black Ink – A Clean Room's Best Friend
This is GoBag Item 0036. Think of it like that high-end sports car everybody drools over in the showroom—shiny, smooth, promises the moon—until you take it off the pavement onto a dirt road. Then it just sits there looking pretty while you wish you'd brought the old reliable pickup. I got excited reading the hype. Bright white barrel? Easy to spot even if it tumbles into leaves or mud—big plus for low-light rummaging. The clip? Solid thick wire, glides right over a heavy jacket collar, thick jeans pocket, or the strap on your pack without snagging or bending. Squeeze the top and it pops off clean—no wrestling. That's thoughtful engineering. Ink flows jet-black at first, lays down razor-fine lines, and laughs at water. Snow melts on your notebook? No smear. Accidental dunk in a creek? Words stay sharp. That's the waterproof pigment ink doing its job—real survival value there. But here's where the dream crashes. That 0.38mm tip is delicate as a glass Christmas ornament in a toddler's hands. One bounce off concrete or a rock, and it starts skipping, giving you half-lines with a gritty scrape like dragging a key across a chalkboard. You curse, shake it, try again—same story. Next pen from the pack fires up smooth... until you hit regular notebook paper or something with a bit of tooth. Paper fibers sneak in, clog it, and you're back to scratchy inconsistent lines. Switch to fancy smooth paper to baby it? Great for a while, but around halfway through the ink, it fades to ghost writing and that annoying drag again. Dust, lint, angle, who knows—it's finicky. These things shine in a climate-controlled office or a clean desk setup. Drop one once in the field? Your notes turn into hieroglyphs when you need them legible most. In a real bug-out or SHTF scenario, when your hands are cold, dirty, shaking from adrenaline, and the paper's damp or crappy, you can't afford a tool that quits halfway or demands perfect conditions. Your life might hang on a quick map sketch, a message left for somebody, or logging coordinates. A pen that flakes out is worse than no pen—it's false hope. I've tested these twice over the years, same results both times. Design hasn't toughened up. They're still the prima donna of gel pens. For GoBag duty, they earn 3 out of 5 - and that's being extremely generous. Nice to look at, killer ink when it behaves, but too fragile for the chaos we're prepping for. Save your money and grab something battle-proven instead—like a solid ballpoint that doesn't care if you drop it in gravel or write upside down on wet paper. Higher price doesn't always mean higher value when reliability is the only currency that counts. Choose tools that stay with you till the end, not ones that bail when things get ugly. Your future self will thank you.
R**D
Favorite pens ever
Favorite pens ever since trying them. The ink is very smooth with a true black color after it dries. I have used every pen in the box with absolutely no leakage. The thin 0.38mm tip allows for effortlessly beautiful writing.
L**A
Absolutely the best pen I’ve ever used
Best pen I’ve ever used ! So I do recommend this !
J**A
Excelentes boligrafos
Tengo una prefencia de los bolígrafos uniball a los pilot, desde mi experiencia la escritura es más fácil de realizarse y nunca eh tenido una falla de un bolígrafo de esta marca, aquí la precaucion es cuidar que no se te caiga de punta, pues al ser tan finas definitivamente lo hechas a perder, de ahí en más son excelentes para la escritura continua y su tinta es muy pero muy buena
C**O
Enjoyable to write with.
Really enjoyable to write with. They put a precise and controllable deposit of ink onto the paper, suitable for fine work e.g. filling in the boxes on forms. Handwriting flows nicely. I prefer this 0.35 mm tip to the 0.5 ml tip version I've bought previously.
H**N
Great quality great price
It was recommended by a friend, bought a pack for a great price, writes incredibly well, doesn't dry up, definitely recommended
E**Y
Super great 0.38mm pen!
I've always had trouble finding the right pens because I tend to write very small. Most of the pens I've used before smudge easily, and the lines are too thick, making my writing hard to read. It was frustrating and made note-taking a hassle. When I found these pens, I was pleasantly surprised. The quality is excellent, and they last a long time. The fine tip allows me to write neatly and fit much more on a single sheet of paper, which is incredibly helpful for school. Plus, the ink doesn't smudge, keeping my notes clean and legible. The pens arrived in perfect condition, exactly as described. The ink flows smoothly, and the pens are comfortable to hold, even during long writing sessions. For the price, they are worth it. The value you get for such a reasonable cost is super nice (especially in this economy). I'm so happy with these pens that I decided to buy the colored version too. They are just as fantastic, adding a vibrant touch to my notes. I am 100% satisfied and will be buying more in the future. These pens have made a huge difference in my schoolwork, and I highly recommend them to anyone who needs precise and reliable writing tools.
Trustpilot
2 days ago
2 months ago