1 / 7Uni-Ball Power Tank 42070 Retractable Ballpoint Pens, 1.0 mm, 12-Pack
Uni-Ball Power Tank 42070 is a 12-pack of retractable black-ink ballpoint pens with a bold 1.0 mm point. The listing describes pressurised ink for writing on wet surfaces and in cold conditions, so it may suit outdoor notes where ordinary pens can be inconvenient.
At a glance
- The listing describes a pressurised ink tank intended to write on wet surfaces and in cold temperatures.
- Retractable design and a textured grip are specified.
- The black ink is described as Uni-Super Ink, with claims of resistance to water and fading.
Often bought together
Pros and cons
Pros
- A 12-pack provides multiple pens for shared use or keeping spares in different locations.
- The bold 1.0 mm point and retractable mechanism are clearly specified.
- Customer feedback reports useful writing performance in cold weather and outdoor settings.
Technical specifications
15 specifications| Brand | Uni-Ball |
|---|---|
| Model | Power Tank |
| Pen type | Ballpoint Pen |
| Ink colour | Black |
| Point style | Bold |
| Line size | 1 millimeters |
| Action | Retractable |
| Ink base | Hybrid |
| Grip | Textured |
| Hand orientation | Ambidextrous |
| Dimensions listed | 16 x 143 x 13 millimeters |
|---|---|
| Weight listed | 109 g |
| Diameter | 5.63 millimeters |
| Body material | Plastic |
|---|---|
| Water resistance listed | Water Resistant |
What to know before buying
- The manufacturer describes writing on wet paper and in temperatures down to -20 °C. These are listing claims, not independently verified performance guarantees. The listed water-resistance rating does not specify how much exposure the ink or pen can withstand.
What’s in the box
Included- 12 ballpoint pens
Who is it for?
A good fit for
- People who want a multi-pen supply of black retractable ballpoints.
- Outdoor users seeking a pen marketed for cold-weather and wet-surface writing.
- Writers who prefer a bold 1.0 mm point and textured grip.
Less suited to
- Anyone looking for a fine-point pen or a colour other than black.
- Buyers who need a quantified water-resistance rating or independently established extreme-condition performance.

Customer reviews on Amazon
- 5 stars
89% 89% - 4 stars
5% 5% - 3 stars
3% 3% - 2 stars
0% 0% - 1 star
3% 3%
Customer feedback is strongly positive overall, with customers highlighting writing performance, quality, comfort and cold-weather use. That reported outdoor usefulness is relevant to a pen marketed for wet surfaces and low temperatures, but customer impressions do not establish a specific performance limit. The rating distribution is mostly five-star, with a smaller one-star share, so experiences are not uniformly positive.
Positive themes
- Customers report good writing performance and comfortable handling.
- Customers describe the pens as useful in cold weather and for outdoor work.
- Feedback also praises durability and resistance to smudging.
Frequently asked questions
What comes in this pack?
The manufacturer lists 12 Uni-Ball Power Tank RT black ballpoint pens.
What point size and ink colour are listed?
The listing specifies a bold 1.0 mm point and black ink.
Is this pen intended for wet or cold conditions?
The manufacturer claims it writes on wet surfaces and in temperatures down to -20 °C. Treat this as a product claim rather than a verified guarantee.

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