---
product_id: 48187706
title: "Power Tank Black Ink RT Ballpoint Pen - Black (Pack of 2)"
brand: "uni-ball"
price: "$20.96"
currency: USD
in_stock: true
reviews_count: 13
category: "Uni Ball"
url: https://www.desertcart.us/products/48187706-power-tank-black-ink-rt-ballpoint-pen-black-pack-2
store_origin: US
region: United States of America
---

# Waterproof & writes on wet paper Writes down to -20°C Smooth 0.4mm line, writes at any angle Power Tank Black Ink RT Ballpoint Pen - Black (Pack of 2)

**Brand:** uni-ball
**Price:** $20.96
**Availability:** ✅ In Stock

## Summary

> 🖊️ Power through every note, rain or shine!

## Quick Answers

- **What is this?** Power Tank Black Ink RT Ballpoint Pen - Black (Pack of 2) by uni-ball
- **How much does it cost?** $20.96 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/48187706-power-tank-black-ink-rt-ballpoint-pen-black-pack-2)

## Best For

- uni-ball enthusiasts

## Why This Product

- Trusted uni-ball brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Value-Packed Duo:** Two pens per pack—because one is never enough for the go-getter
- • **Unstoppable Ink Flow:** Writes flawlessly from any angle—even upside down!
- • **Extreme Weather Ready:** Cold-resistant ink performs down to -20°C for all conditions ❄️
- • **Durable Outdoor Design:** Rugged body built to withstand tough environments and daily wear
- • **Waterproof & Tamper-Proof:** Ink stays sharp and smudge-free on wet paper and resists fading 💧

## Overview

The uni-ball Power Tank Black Ink Ballpoint Pen is engineered for professionals who demand reliability outdoors and in extreme conditions. Featuring a smooth 0.4mm line, waterproof and fade-resistant ink, and the ability to write at any angle—even on wet paper and in freezing temperatures down to -20°C—this retractable pen combines durability with precision. Packaged in a convenient set of two, it’s the ultimate tool for managers and creatives who refuse to let environment limit their productivity.

## Description

uni-ball The Power Tank is the ultimate outdoor pen. It writes at any angle, on wet paper and even down to -20 ° C. The durable body makes it strong enough to withstand any test. It also contains super plain ink, which is fade resistant, waterproof and tamper proof. 1.0mm wide line

Review: uni-ball Power Tank SN-220 Ballpoint RT - Great pens that perform well without smudging , etc. Also , writes at any angle. Effectively , have all the attributes of a 'spacepen' but at a far cheaper price. Highly recommended.
Review: Great versatility and value! - I have purchased several of these MITSUBISHI UNI-BALL POWER TANK pens over time and have found them to be incredibly versatile and hard wearing. They have a very comfortable grip and have a satisfying ink flow and style. When I first bought one I didn't realise it was waterproof ink and could be used on wet paper or upside down! I have purchased refills since then as I consider these to be much too good to think of as disposable pens! I now keep one in all my jackets and in my car glove boxes! People who have borrowed them from me have committed theft in order to keep them!! Buy one and you'll soon realise it was a good purchase........ and why the unscrupulous might steal it from you. Ha Ha!

## Features

- The optimal outdoor pen
- Practical set of two pens
- Produces an average smooth writing line of 0.4 mm. Writes from any angle
- Cold resistant ink makes it ideal for use in cold rooms
- Written on wet paper. Writes down to -20°C

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00C7RZ004 |
| Age Range Description | Adult |
| Age range (description) | Adult |
| Best Sellers Rank | 53,223 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 371 in Ballpoint Pens |
| Body Shape | Cylindrical |
| Brand | uni-ball |
| Brand Name | uni-ball |
| Closure Type | Retractable |
| Colour | Black |
| Country Of Origin | Japan |
| Customer Reviews | 4.5 out of 5 stars 287 Reviews |
| Drill Point | ball point |
| Global Trade Identification Number | 05012788000344 |
| Grip Type | Rubber |
| Included Components | 2 pens |
| Ink Base | Water |
| Ink Colour | Black |
| Ink colour | Black |
| Is the Product Left or Right Handed? | Ambidextrous |
| Item Diameter | 0.4 Millimetres |
| Line Size | 0.4mm |
| Manufacturer | uni-ball |
| Material | Tungsten Carbide , Plastic (PC/PP) |
| Material Type | Tungsten Carbide, Plastic (PC/PP) |
| Model Name | Power Tank |
| Model Number | 153486248 |
| Recommended Uses For Product | Construction:, Industrial use, Outdoor Activities |
| Special Features | Durable, solid |
| Style | Retro |
| Unit Count | 2.0 count |
| Water Resistance Level | Water Resistant |
| Writing Instrument Form | Ballpoint Pen |
| Writing Technique | Ball |
| Writing instrument form | Ballpoint Pen |

## Product Details

- **Age range (description):** Adult
- **Brand:** uni-ball
- **Colour:** Black
- **Ink colour:** Black
- **Material:** Tungsten Carbide, Plastic (PC/PP)
- **Model name:** Power Tank
- **Point type:** ball point
- **Special feature:** Durable, solid
- **Unit count:** 2.0 count
- **Writing instrument form:** Ballpoint Pen

## Images

![Power Tank Black Ink RT Ballpoint Pen - Black (Pack of 2) - Image 1](https://m.media-amazon.com/images/I/61eho5Ry8wL.jpg)

## Questions & Answers

**Q: The picture shows 2 pens, yet the description "in the box" says 3 pens. Which is correct?**
A: 2

**Q: Can you buy refills for these, and if so where?**
A: I do declare that you can buy them. I have seen them on Amazon (albeit a while back) but in my opinion you are better off buying another pen. The refills aew probably as expensive as the pens!

**Q: 0.4 mm or 1mm as it says both in the write up  ?**
A: I've bought these (in blue) on more than one occasion and have never noticed that! My ones have 1.0 stamped on them which I take to mean 1mm. When I write with them it doesn't look particularly 'skinny' so my guess would be that it is actually 1mm and not 0.4mm. Sorry I can't be any more help.

## Customer Reviews

### ⭐⭐⭐⭐⭐ uni-ball Power Tank SN-220 Ballpoint RT
*by M***S on 26 August 2023*

Great pens that perform well without smudging , etc. Also , writes at any angle. Effectively , have all the attributes of a 'spacepen' but at a far cheaper price. Highly recommended.

### ⭐⭐⭐⭐⭐ Great versatility and value!
*by I***Y on 15 December 2013*

I have purchased several of these MITSUBISHI UNI-BALL POWER TANK pens over time and have found them to be incredibly versatile and hard wearing. They have a very comfortable grip and have a satisfying ink flow and style. When I first bought one I didn't realise it was waterproof ink and could be used on wet paper or upside down! I have purchased refills since then as I consider these to be much too good to think of as disposable pens! I now keep one in all my jackets and in my car glove boxes! People who have borrowed them from me have committed theft in order to keep them!! Buy one and you'll soon realise it was a good purchase........ and why the unscrupulous might steal it from you. Ha Ha!

### ⭐⭐⭐⭐⭐ It writes upside down!
*by M***H on 16 May 2022*

Writing at awkward angles was why I bought these and they do it well. Could be a bit cheaper and no more or less sturdy than any other plastic pen. But as it's main trick is writing upside down and it accomplishes that it has to be 5 stars over all.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-09-28*